One thing that people seemed to gripe about is the A button mashing, and the tedious and very very boring times when your character has to get up. That makes the game *very* annoying, and while I think BustaUppa has a point that it may be due to the emphasis on *one* button, I also think that it's not fun to jam on a button incessantly for 25 seconds or so before your dude gets up.
This is also evident in cage matches. Climbing up the cage takes 3 seconds, and climbing out involves jamming on the A button, again, incessantly. Not fun, not fun at all.
As a whole, the game is very good, if only a marginal improvement over the original. The submission changes only change the application or reversal of submissions. If you grapple a guy into a submission, you have four choices (u,d,l,r on the C stick, needlessly labeled as "submit," "taunt," and two other meaningless titles). If the person (or CPU) put into the submission guesses the same direction as you (if you both push left), then the submission is reversed. If not, you get the submission on. It's interesting, but its application really cuts into the otherwise fast-paced (though not SmackDown! fast, thank the maker) gameplay.
It's a fun game, and the story mode in DoR and DoR2 (thus far) are excellent, and even tie into each other. However, I should have waited until it hit $30 (though I'm not really upset over it).