They should add a Hand Glider. That would be awesome. Or these.
Shift key: Switch between grenade types
Flash Bombs: Blinds and stuns all enemies on screen and not under cover or looking the other direction for a few seconds, but not the thrower and its allies.
Dust Bombs: Makes a dust clouds that when characters walk threw the dust moves like you walk through it. Perfect for fighting ghost.
AI should not see ghost at all.
AI turrets. (can see ghost) (uses vehicle weapons, or triggered vehicle weapons.)
Riot shields (indestructible, but cant protect you from explosives, splash and virus drones) and energy shields protect you from every thing but can be destroyed) Deployable and energy shields should have a lot more hit points.