I doubt very much that the general market they are targetting is anywhere near as outraged about these changes as the vocal critics are.
What we're seeing here is a small fraction of their consumer base being outraged at changes to their franchise, and registering their complaints by slamming it in reviews and in forum posts. While it is certainly valid that certain DAO fans are displeased by the changes, it does not in any way mean that it is a bad game, or that anything but a vocal minority is displeased.
I would not be in any surprised if Dragon Age 2 performed very well with gamers in general, or even if the great majority of DAO fans were still pleased by DA2 (as I am).
As such, no, I think it is very unrealistic to expect any "fixing" to the game beyond the usual bug fixes.
Just because a subset of players is dissatisfied with changes is not going to get them to somehow re-engineer the game. Do not make the mistake of thinking that the current outcry means the game is a failure. Odds are it will still be hugely successful, especially since it is made more appealing to the console market (which is 90% of its market in the first place).
What you CAN hope for, however, is that some of the criticism is taken to heart when time comes for Dragon Age 3.
Personally, I think most of the problems with the game stem with a reduced development time, which forced them to re-use maps and minimize itemisation and so forth. An extra year of developement would probably have resolved most of the general complaints.
Of course, the combat would still be faster and the protagonist will voiced, and that is EXTREMELY unlikely to change. Some "old school" players might not like then and be near-hysterical about it, but the fact is that these ARE improvements as far as modern game design are concerned, and they're not going to go away. And on a personnal level, as an "old school" Bioware fan, I rather like it. It makes for more fun combat and better storytelling.
Thank you.
Itkovian