Just because you don't find it logical or fiscally reasonable gives me no reason to believe that BW feels the same. And think about it for a moment. Everyone is saying that the new protag is the cheaper route, yet we have a whole series (mass effect) where what they did was have a returning protag. Dragon Age didn't do that but they certainly tried to do it with Da2. It failed. Hawke wasn't popular. Now we have an instance in DaI where it seems to be hinting at a returning protag. So why do that if its not the cheaper route? And just because you might not think it hinted at a returning protag does not mean it did or didn't. Many believe it did and that's how they see it. It's all perspective.
Because it's your opinion that they're hinting at a returning protagonist, one which others don't share.
I don't really care about the LI's, returning companions, or whatever else. What I care about is the inquisitor has the potential to have a crazy awesome story! Something unique, something new! The new protag has a potential for an average story that we've already seen from their previous games. The whole game would basically be an introduction to this character the we never play again. Just like DaO was for the warden, Da2 for Hawke, and DaI for Inquisitor (unless quizy returns). So going to a new protagonist feels like a dead end. I can play their story with the inquisitor just as easily as I can play them with it. I can't, however, play new protag with inquisitors story involving Solas and have it have the same emotional effect.
And I also find it funny people think that quizy has no stake in the qun/tevinter conflict. Because they say themselves to bull at some point in the game that the qun pose a threat to all of thedas. They also may or may not have an alliance with them, depending on certain choices, and they were almost killed by a bunch of them in trespasser because they were accused of being fen'harel's agent.
I forgot they can say they pose a threat to all of thedas or something like your culture is interesting. So that's if you choose the option. But its in there
And I would argue that a large portion of the vocal fans do care about these issues, and have been shown to be able to call negative media attention to Bioware if they're displeased (ME3 ending)
1. "This is Dragon Age, not Mass Effect" is a terrible argument. It says nothing. You could say it isn't Skyrim, or Halo, and it would mean the same thing. Any of those games doing something doesn't automatically mean it would be a bad idea for Dragon Age to to the same, and naturally it doesn't mean it's a good idea either. Hence what I said about how that's basically saying nothing.
2. They're actually not different design teams - Bioware Edmonton did both. At least, they're the same as much as any studio is the same after a few years.
3. I wasn't being superior, I was being incredibly frustrated.
4. You are not in a position to say whether it's financially feasible - at all. And whether it's logically feasible is obviously subjective.
I admitted it wasn't done well in some cases. That's not a reason to give up though. I didn't even say they should do it, I was saying they have and they can again, preferably better.
Yeah, it's pretty annoying that if you have the Optimal Cutting perk you can go out and get ten plants by just by stopping for literally one second and picking one plant, and yet you only get six for a war table mission dedicated to gathering them... that I suppose takes literally a few hundred times longer 
All right let me expand. In ME series, we have only two PC voices, male and female. In DAI we have four. Barring Liara and femShep, all romances prior to ME3 were heterosexual, so they didn't need to record dialogue twice with different pronouns. And not with four different voice actors. Plus, DA has always had more immersive companion banter, and one good thing with DAI is that banter referenced romances, which I don't believe ME did. So that will be an additional expense of recording the different worldstate permutations if they want to continue making banters dynamic.
In ME series the player has two LI possibilities to import into ME2 and up to 5 possibilities into 3. Yet in 3, each romance is given a reaffirmation dialogue, so even if a player romanced Liara for the past two games, ME3 treats it like "hey do you still want to romance her?" rather than "you have been in a romance with this character for the past two games and this dialogue reflects that." Also, as a series planned as a trilogy from the beginning, the devs would have had some advance warning when designing the romances to leave them open ended, so that the PC is not locked into a romance for three games if the player wants to try different LIs, if their LI died (mandatory death of the Virmire squadmate). This wasn't always done well, but at least the romances did not have a conclusion at the end of each game.
In DAI, we can marry Sera or Cullen. This automatically makes the nature of the romantic relationships different than ME, where there is no promise of commitment or looking to the future. In that series, it's a battle to stop the Reapers, and whatever romance happens is arguably not expected to last. In DAI, the game is about the Inquisition's rise and fall and is self contained with the companion stories.
Do you really think Cullen romancers are going to be happy if he doesn't appear in the game, just sends a letter to the PC? Or worse, the PC decides to romance someone else and either divorces him or cheats on him? These are fans who have wanted to romance him since the first game in the series, and now Bioware is going to say he doesn't have to be a happily ever after ending? Even if players don't dump him, they will be upset knowing that it's a possibility, and potentially dislike their PC for having that option.
And if returning LIs don't appear in game or have a brief cameo, that is punishing the player who wants to continue as the Inquisitor but also plays Bioware games for the romances. We get an entire game of: letters from a LI, a cameo scene with their LI, or dumping their LI for a current companion. So ironically, anyone who wants to play as Inquisitor and keep an "active" romance in the game needs to start DA4 single.
As for ME and DA not being different design teams...they have different lead writers and writing staff, and they are geared toward different gameplay experiences. ME is a space opera shooter, where we don't control our squadmates and the overarching focus of the series is stopping the Reapers as Shepard. DA currently does not have an overarching theme other than learning more about Thedas. There is carry over information and subplots between games, but each game can be taken independently. The focus in DA is geared more heavily toward companions while ME most interaction is only done between Shepard and a companion, with less content between the companions.
Your argument seemed to me like, "I like this idea and see why it's feasible, so others who don't agree are wrong." You're not responding to my points or debating them, you are flat out saying it can be done this way, end of discussion.
And no, I don't know what's is financially feasible, any more than you do. But I am raising points which are addressing, in my opinion, why this isn't financially feasible. You are just telling me I'm wrong instead of providing a reason why.