The big announcement recently from AV about DF:UW is that they are doing away with the class system and going back to a more free-form character skill system.
The perception on Forumfall was that due to classes, balance was poor. The reality in-game was that basically all roles were used, and really only Fire and Brawler were not considered viable primary choices. Everything else you saw in-game, at almost all levels of play (including the most recent tournament), which should tell you all you need to know about balance and viability.
The other bit that is clouding judgment right now is the revisionist history of what DF1 really was. It has somehow gone from a game that was always dominated by FOTM builds to one where people all had their own ‘style’, and focused on what they were best at, which is not only a lie but a total joke.
In short, I think this direction change by AV is a mistake and moves the game back towards the problem areas of DF1, but I’ll wait for the details before going any further than that. MMO history, and their own, is against AV here however.