As long as they apply the three-wave attacks with a bit more restraint instead of using them every bloody time! I'd be glad to never see them again, really. I am concerned about area re-use, which was one of DA:O's weaknesses too (you'd see the same few wilderness areas repeated often, for example, and there were only two(?) street layouts for Denerim besides major areas like the market) but which was really terrible in DA2. I'm sceptical that it'll properly be addressed since it's the sort of thing that takes time to develop properly, and time isn't something that fits in well with EA's "out the door as soon as possible" strategy where they'd have yearly releases if at all possible.
I've heard that the DLC for DA2 has a really nice balance of waves, non-waves, and other encounter types, while also taking the time to give most of the waves logical spawn-points. I don't know if this is true or not though, since I haven't bothered to play the DLC yet.
Anyway, for all those who say that they love Origins and hate ][, this reminds me of a question: how on earth did you tolerate the mind-numbing boredom of the deep roads and the other marathon dungeons of Origins? I really feel like the only difference between the dungeons in O and ][ is that O had ten tilesets and made you visit them each once, for five hours of mindless combat, whereas ][ had ten tilesets, and made you visit them each twenty times, for 15 minutes of combat.