I read somewhere that some of them are established dancers. I've wondered why they are so old (for a dancer) and figured they have careers that have stalled out. Not so for some of them, some of them were simply recruited to give the show more credibility. Cody and Michelle are in Broadway shows while Nick owns his own studio and works in the film industry and Adriana is in a dance company. Rumor has it that Tova was also recruited.
The point of all that is this.....why aren't we seeing better dancing? The final dances are beautiful! I want to see more of that during the show itself. However, like most reality shows on Bravo they take a couple of seasons to really hit their stride. Season 2 (if there is one) will have the benefit of the show having more exposure which means better dancers and HOPEFULLY a new hostess!
I base this on shows such as Project Runway which was dreadful it's first season (I recently rented it and watched the whole thing and feel that the designers from last season would have destroyed the ones in season 1) and Top Chef (I love Harold but the rest of the group wasn't all that talented). Anyways, hopefully if there is a Season 2 it will go the route of the other Bravo reality shows and be better (although I still like this one just fine and its filling the void till SYTYCD starts)