Its impact is more than you think. hardcoe gamers could play it because of the gameplay mechanics, but mainstream gamers demands more eyecandy things, death animations is one of those things. That's why there is a slowmo death animation trailer for Killzone 2. People cares about these things. That animation is only in free-to-play games novadays, not in 50$ game. Game engines are far more advanced that they are able to revive a ragdoll body (BF:BC2). I keep pointing those games because this game targeted for that market.
So before this thread this game looked like A class action-packed FPS game that can compete or even beat CoD, BF, ID's Rage, Bulletstorm... But after seeing those latest gameplay videos now it's like 20$ indie game, just a bit better than Team Fortress 2. I hope I'm wrong
And also I don't understand why I'm exaggerating this subject