If you're not trying to speak for everybody, OP, why include a line like "Everybody here feels like this" in your first paragraph?
If I believed what I read on the forums for all the Dragon Age games, I would think DA2 and DAI were failures and DAO was the best game ever. I don't think that. You're certainly welcome to your opinion, as is everybody else who agrees with you. I have liked all three games. I was skeptical of DAI at first because I did not quite get the design, but now that I am playing through it again, I think it's very fine.
There are things about the current direction of Bioware RPG games that I don't love entirely; I'd prefer less voice acting and more complex storytelling and variety in the quests. Certainly the main story and the character relationships in DAI are complicated and well done, but I do agree that the background quests could have been stronger. This current game engine does not do cities very well. Thedas feels like a big wilderness with hardly any settlements.
But that's not a major problem when I think of all the things that this game gets right. While I don't like it as well as the Baldur's Gate series in terms of complexity of combat, I still like it very much. I don't miss the tactical settings of DAO very much; I did enjoy that game, but in terms of simplification, it was much simpler than the DnD-based games that preceded it, especially in terms of magic. While the lore of Thedas is strong, it does not compare with Faerun in terms of depth of the spell system and diversity of creatures. So if you are going to talk about the evolution of the games as a dumbing down, DAO is not the place to start. The games before it were harder; some of the fights in the BG and NWN series simply couldn't be won unless the player knew the right spell to use at the right moment. I do miss that.
However, I'm also aware that I'm older and harder to please in general and I refuse to be one of those people who thinks that looking backwards is worth very much. DAI is a good game and I will play it with a great deal of satisfaction for several more play-throughs, I expect. This second run-through has shown me how much depth there is to the characters and I have found lots of stuff I missed the first time. Now that I understand how barrier and guard work, most of my complaints from the first time I played are negated. This combat system is very dynamic and I find myself hardly needing the tactical camera at all. The fact that this is a change from previous games doesn't matter. I can accept the change.
Again, this is my opinion; I'm not speaking for anybody else. It doesn't matter what the developers do, they are going to get endless rants and complaints no matter what. So that leaves them free to do what they please in the end.