Part of the original Crysis's problem is that Crytek didn't set up their own game's settings very well. Modders have definitely made the game look much better than its stock form. It can look better than stock and run faster at the same time. But still the more recent tech in Cryengine 3 can make for superior visuals due to the improved tone mapping and such. It is unfortunate that they go overboard on the effects to show them off.