All I want is the gameplay to feel less stiff. Jumping and going into cover should feel seamless when pressed and not make Jensen feel robotic.
Maybe remove the large energy requirement for melee and other tasks and remove third person take downs and just have an animation instead.
More weapons is always welcome and augmentations is a given and they are always welcome.
I also like the customization on the fly but doesn't this mean that weapons will no longer have permanent customizations like human Revolution?
Maybe larger maps and an even bigger city hub with it's own missions in it like Detroit.
Also, I would like the more straight forward guns blazing option to be more satisfying and to give you more XP in having more creative kills. I remember that knocking out or stunning enemies gave you much more XP than killing them.
More powerful augmentations that can physically change how the character looks. I only remember using the typhoon twice, but it never really changed how Jensen looked.
Any more pics?