I think the no suit players look a little boring in multiplayer. It would be much better if the players looked like the Marines (brown uniforms) and CELL (black uniforms with red/blue visors) from single player.

http://images.wikia.com/crysis/images/c/c5/Crysis2_Screen6_05122010.jpg
That would be much better than the current CELL no suit.

Aren't the C.E.L.L. guys wearing nanosuits of some description in Singleplayer though? It certainly looks like nanomuscle when they're dead.

I think they are just wearing standard uniforms. Ill edit it in some better screenshots soon.