I'm going to disclaimer this with of course everyone has their own opinions on things like romances, companions, and stories. Duh. I'm not trying to invalidate your opinion as to preference, even if I reply to you.
Seriously, DAI is a jack of all trades, master of nothing, this game has absolutely no focus, and therefore, no pace. It basically flops between two types of game, a lackluster Bioware style narrative but with great characters or an average exploration based RPG, neither top of the class with a combat system that wants to go two different directions as well.
I deal with the combat in a moment, but I like the semi-open world A LOT personally, and I like the way I can pace the story as a player. That's a kind of freedom very few games with good stories (and I think this game has a good story) have - that's not just Skyrim level freedom, because you can actually cobble together a story that makes total sense, it's better. They wrote a beautiful story, and I can be it's conductor. I can move bits around (some), choose different options, put in the side stuff where I think it makes the most sense, etc. Great for replayability. What you find unfocused - I find to be freedom.
Now let's talk combat:
The combat still isn't good, and this series, its never been good. DAI is a poor tactical RPG, unlike Divinity Original Sin (although that game is also very far from perfect, but its tactial combat is great) and its a poor hack and slash, definitely far below the combat seen in Dragons Dogma, which totally destroys Bioware when it comes to dragon and giant battles, much less normal mobs. Instead of choosing one style or the other, Bioware decides to keep the flaws of having both styles which clash with eachother. Combat i s a boring chore that drags the gameplay down. Nevermind the enemy variety is sorely lacking and the dragon battles after a few get redundant and less unique
I like the two combat styles too (again, freedom, choice, love that in my RGPs), but I don't generally prefer true tactical RPGs these days (I remember enjoying them in the 90s when I didn't have a lot of choice), unless we're talking about a tiny, niche turn-based game, like a Costume Quest or Child of Light; I do enjoy those from time-to-time. But I enjoy Tac Cam, despite it's flaws. And it is imperfect. They admit as much. It's still a nice addition, and the fact that everyone thought it'd never work for controllers but it works beautifully for them makes me happy.
I liked DD, but I prefer this combat, personally. I found DD to have weird difficulty spikes. DAI combat reminds me of pen-and-paper mechanics where my levels and items matter enough to make or break fights, more so than my moment-to-moment skill, yes, but where my moment-to-moment skill can still overcome being slightly too underleveled, etc. To me, it's a nice balance. To you, it's unfocused. Now, granted, I don't think it's the best combat of all-time. (RPGs rarely have that.) But I find it more engaging than the first two DAs in combat, for sure, and better at combat than a lot of the games you listed (though my problem with Original Sin likely has more to do with having to use a M+KB to play than anything else - the combat is likely good for someone who doesn't find that annoying).
I agree with you on enemy variety. Enemy AI and companion tactics (adding it back in) would also be improvements by far. Since they clearly had trouble with Frostbite from what they've said and the delays, I give this a reasonable pass (I didn't want to wait any longer for this - I'd rather have this game as-is and them consider adding back Companion Tactics and improving enemy AI to make it something truly interesting for DA4; more enemy types would also be good; in DA4, which will be a totally this/next-gen game, I would expect to see this; too much had to be accomodated for older PCs and old consoles in this one, I imagine; it already doesn't run well on a lot of midrange, slightly aging PCs or the old 360s and PS3).
I wouldn;t call the companions shallow, but other than Cassandra (who is the deueteragonist), Solas, and Varric, they have very little or nothing to do in the main plot. And Dorian or Cole takes a back seat after they are recruited for good. Unlike DA2, which every character got not only three major character missions, but almost everyone of them played a role in the plot.
Cole has 2 major companion missions after that. And then another pretty cool scene.
Dorian has a companion mission after that, too.
All of the companion missions are way deeper than DA2, and I don't remember doing 3 character missions for each one. Are you counting the gifts?
Most of the characters present a POV necessary for the main story, rather than being tied to it directly. This is true in all 3 games. But especially 2, where you wonder why Hawke's rivals stick around, except for his sibling, Varric, and maybe Aveline, for 10 years despite disagreeing with him on basically everything.
The reason I don't share your view doesn't make my view wrong, but no.... not again this "wrong opinion" issue.
Viv and Sera are as one-dimensional as it gets. Varric, while being the best DA II companion, stays surprisingly reserved. There are some who undergo development, but all in all I wasn't content with how they turned out in general.
Neither of those characters are one-dimensional, and if you get to know them, they show other sides. Viv puts on a mask, true to her Game mastery, so she may appear a set way, but the mask falters at points. Sera is hardly one dimensional. Annoying? Yes. But she has many facets that aren't clear at the start; her clingy devoutness to the Maker, for instance. She's an interesting and realistic product of the slums of Denerim.
One-dimensional =/ not likable. I agree those 2 characters are ones you have to actually try to like (you have to try to see their perspectives, and many players cannot or will not) but they are not as one-dimensional as they seem at first. If you take someone at face value, everyone is one-dimensional. That's realistic to how you get to know people IRL too.
I said above I have no interest in bashing someone's opinion - that's unless it's something blatantly false like misunderstanding what makes a one-dimensional character (or a "flat character" as they are also called). Since all the companions evolve dynamically or show different sides as the story goes on, none of them are flat characters in a literary sense; if you don't see the other sides, you may not have enough approval or you may not have triggered it, or you may just not be paying attention.
As to Varric being more reserved, I think it'd be weird if he wasn't, and he still has moments, especially near the beginning, where he tries to diffuse with humour but finds it not working out for him and still being terrified and wearied by events. Red lyrium is spreading, there's a hole in the sky with demons spewing out, and he feels partially responsible for A) letting red lyrium out, and
not telling Cass where Hawke is, though he knows and wants to protect his friend, in case it could've helped, and C) helping start the Mage/Templar war. How much gaiety did you want from him exactly?
No, The Mass Effect companions, such as Garrus, Tali, Liara, EDI, Moridn, Thane, and Miranda are far more complex, but to be fair they were in two or three games.
But DAI companions do seem to lack development outside of Cassandra, Blackwall, Cole, and Iron Bull. Its basically the advisors and Cassandra that get most of the development. And its mostly more tell than show.
But the romances are a huge step back....ugh.
I found a romance I could tolerate in DA2 (Anders - at least it's tragic) and one I could love in DAO (Alistair), but so far, I've found 3 I enjoyed in DAI (Cullen, Solas, Sera). Cullen so much so I'm re-doing that one now. I'm also interested in basically everything left, and I started working on an idea for TWO male Inquisitors to romance Dorian and Cassandra. I never do male characters (tried once for Morrigan, found the romance beginning terrible, and never finished the playthrough) so that's saying something.
Maybe they don't appeal as much to men, I don't know. I think all the characters are great this time and the romances are excellent. The Sera one had a few annoying parts, but it's so sweet in a way (she just wants acceptance, the loony gal), and it ends on the funniest line I've seen at the end yet ("Let's push the bed off the balcony." Oh, Sera.)