People thought it was racist because all of the zombies were black, though I don't quite understand it myself, unless they're in settlements where there would be a few white people, then maybe a few white people would make sense. Previous Resident Evil games didn't have many black people in them, I think the cry of racism is itself indirectly racist itself.
Maybe they've worked around it by having white gun dealers or missionaries.
With Left4Dead, I love it, especially when playing online, jumping the survivors playing as a hunter can always be fun.
I can't wait until Resi Evil 5 comes out, not played 4 yet, so I don't know what this 'change' in the way the game plays is like, but as long as it has the Resident Evil atmosphere and the sense of hyper-constriction when fighting - if you can run and shoot, then that's a bummer, it'd just make the game easier and more like an FPS. But from seeing the trailers, it looks cool.