http://www.shacknews.com/onearticle.x/63228
One of the primary goals behind Crysis 2 was to make the super-powered abilities of the Nanosuit more accessible, Crytek president Cevat Yerli told the assembled crowd in New York City's Grand Tribeca Hotel. As such, the developer has streamlined the four powers of the original (Stealth, Speed, Strength, Armor) into two for the shooter sequel--Armor and Stealth.
Activating the Power (PWR) ability provides elements of Strength, Speed and Armor while Stealth (STLTH) allows one to temporarily move about the level both invisibly and silently for a brief amount of time, as noted by an on-screen indicator.
This streamlining also means there's no need for a power-selecting pop-up menu a la the original Crysis. Instead, the presentation indicated that players can switch between the two, Power and Stealth, at a press of a button.
To demonstrate, a portion of the Xbox 360 version was shown running in real-time.
So, Crytek takes the advice of console gamers and decides to dumb it down from an already simple 4-power system into a casualized console version? Or is this streamlining? You decide.