Crysis 2 is a good looking game, but thats about it, I'm sorry but the reason it's so good looking is because thats all the devs worked on, on Killzone 3 they mentioned adding a new melee combat system 3D and move controls on top of improving the graphics on killzone 2, so yeah when you devote everything to graphics it looks good but it doesn't make it a good game or on par with games that look good but do more
Not trying to be mean but you have no idea what you're talking about.
1. The Melee system is not a "system" as you believe it is. It consists of 5 pre-rendered animations that takes no time to implement to the game. Its not some amazing process that takes crazy algorithims to figure out.
2. Crysis 2 is also doing 3D and apparently is doing it much better than Killzone 3. http://www.gamesradar.com/xbox360/crysis-2/news/crysis-2s-3d-tech-is-unbelievable/a-20110318172040751056/g-20090601103043632061
"How do we know this for sure? We have played through roughly 90% of the game in 3D on the 360. Our review won’t be up until Tuesday, but for now we just wanted to share how this may just be the best 3D tech we’ve seen on any game. Yes, the 3D requires a compatible TV, but surprisingly it doesn’t require those expensive active-shutter glasses. We wore crummy-old plastic polarized glasses, and after a comparison assessment, we think Crysis 2’s 3D is miles ahead of Killzone 3’s – even with Killzone using those fancy-pants active-shutter glasses. With Killzone we noticed some significant jaggies that don’t seem to synch well with the 3D, as well as some not-insignificant ghostly double images around much of the environment. It also hurt our eyes something fierce."
3. Move controls don't take a long time to map out. I'm not going to go into detail about this you can look it up yourself. It also doesn't affect the visuals in any manner whatsoever. None of the game's visual artists have anything to do with Move.
Edit: I also forgot, Crysis 2 also has "brutal melees." Neck breaking, throat stabbing and a couple others. Watch some gameplay.