The suit modes were very gimmicky. Cloak and speed where the only worthwhile ones and they could have easily been kept as separate buttons. The radial selector was truly horrible, as in the heat of battle (and often not) I'd frequently select the wrong option. I know they patched in the ability to bind buttons to them but the whole suit powers system was poorly designed and implemented.
And it's disappointing that the game is such an obscene hog when turning up the detail - especially the anti-aliasing - when there are equally accomplished engines that perform stunningly (Dunia). Combined with the mediocre gameplay and generic plot it wasn't a desperately good game, though I found Crysis Warhead to be pleasantly enjoyable - certainly worth the budget price. Hopefully with Crysis 2 they'll actually get things right, though if the engine is at all similar then I have my doubts.
"The price of freedom is eternal vigilance."