I'd take quality over quantity. No need for a massive roster if a ton of them are palette swaps. They really do need to build a graphics engine from the ground up and use new animations as well. And WTF is up with the background rotating separately from the ground still? I accepted it in 1994, but this is unacceptable in 2012.
Well, they're called infinite stages and they're there strictly for gameplay purposes. Only a few of the 32 stages operate that way. The rest have borders and walls.
Tekken is probably not the best game to lump in the "fighting games are stale" pit because it's perfectly successful in the arcades, and the people TTT2 seems mostly aimed at (hardcore) are generally over the moon with the game.
Hell, the game already paid for itself with arcade revenue for a year and continued popularity. The console ports had the luxury of just using some development resources to add bonuses like extra stages and a few extra characters. That doesn't mean bad console sales are a wonderful thing.
But to a degree, fighting games by their nature are not lowest common denominator titles. Unless a fighter is called Street Fighter, and/or made exceptionally appealing to casual players like all the non-critical bonus content in MK, it's not going to sell millions. By the same token, it seems most fighting games also don't cost 20 million to make. Seems like you can make a good fighter for a mid-range budget.
Further problem is that TTT2 isn't Tekken 7. It's essentially a compilation of everything to date in one, which is why there are "clone" characters. The upside is that an actual Tekken 7 would, by its nature, be something "new". Since TTT2 pretty much already has everything existant in it.
Edit: Yeah, before someone points out Tekken has sold millions before, this has already been discussed in the Tekken threads - problem here may be that TTT2 is still hothothot in the arcades, and not everyone in Japan is rushing to jump in on day 1 for consoles. On the other hand, Tekken Tag 2 seems like it will keep slowly selling over time, since it's the ultimate Tekken package. If it does well, it's going to be a slow burner.