I am not worried in the least about this game. There is no reason to believe Bioware has learned nothing from the insane, and frankly undeserved, backlash of past games. I think people completely overreacted about especially ME 3's ending. In my opinion today's gamers expect a bit too much. We hear more and more about a game before release than ever and more people voice their opinions on what should be included in a game which is usually pretty much anything gamers can think of, without ever thinking about the feasibility of their pipe dreams.
I enjoyed DA 2 for what it was. I postponed buying it after the serious amount of complaining about the demo. I do agree that the game was on the light side when I finally did get it, but due to the short development time I understand why.
I enjoyed ME 3 as well. I don't care about the ending, it didn't change my opinion about the game one bit. Heck, I though the ending of ME 3 was at least better than that of ME 2; reaper terminator, ugh.
I also enjoyed SWTOR for what it was. It wasn't a great MMO but I think no MMO is even remotely great. Most MMOs have gotten way too linear which in turn makes replaying not worth it. I did like the stories for the most part which were better than that of most MMOs I have played, although that isn't saying much.
Anyway, I don't have a doubt in my mind I will DAI. I doubt Bioware hasn't "learned" anything. Even a past survey of theirs showed me they are in fact listening. But even then I expect lots of today's gamers to once again be up in arms about the end result of this game mainly because that pretty much happens with any game nowadays with expectancies which can't ever be met. So instead of making a particular game a make or break I think it is better to not expect everything one can think of, no game company will ever make the ultimate game.