I didn't buy DA2 as the original didn't really hold my interest but I just read up on what you are referring to by wave combat. This is pretty much the exact reason I only shell out full price for games developed first and foremost for the PC. Unfortunately, they are pretty few and far between, but you will never see a game developed first for the PC with an issue like that.
A good example of a well produced PC centric RPG "action" game, IMO, is Risen. Knowing the graphics and gameplay decisions were made based on PC tech I never felt like paying $60 upon release was going to end up being a bad idea. It also helped it was coming from a seasoned developer as well. On the flip side though, console design can suffer, as was shown with Risen 1. But that's also a good example of why we need PC and console centric games IMO. Ports can be ok, but it would be a welcome change to see a few more PC only big budget titles IMHO. And i'm not talking "Mass Effect" big budget either. Just something a little beyond indie really.