Part of the gameplay equation is graphics. If the guy you are shooting looks like lego man I would think it would affect gameplay a little. Anyway I would love to see Crysis in Linux, I am currently playing the beta and it looks promising. Oh and I pay a lot for the hardware I have to have the best gaming experience possible so I dont really want to play old games. Nothing against them, just think games like Crysis and Hellgate London have a lot of potential.
Considering that Haze looks VERY nice and definitely close in eye-candy to Crysis, I don't think I'll mind too much.