I think its really cool that you dont need to activate speed in order to sprint ect... for mp it makes it very fast paced and more tactical. However during the campaign I miss the original nanosuit for some reason and I miss the ability to go prone (or i could just be very silly and missing something). Also I wish that the mp nanosuit designs were more like the SP one :p its just so much more badass in my opinion.
all in all though I am thoroughly enjoying crysis 2
just wish my pc didnt get destroyed by a basemant flood... I love my 360 but I feel like crysis is more of a pc experience :p (hehe loved the achievement called Can it Run Crysis? made me laugh quite a bit
)