I have no idea why PC players cannot assign grenade and melee attack to separate buttons. Anyone have an explanation for this? The only reason I can think of is,...whoever did the PC port was REALLY LAZY!!!

That also might explain why I get FPS drops all the time even with all the settings turned down. Otherwise having a great time.

I imagine there will be a mod soon that might be able to fix this, if it is fixable and not baked into the game engine (which, to be honest, I highly doubt). It sounds like a ridiculous decision but the only potential reason I can think of would be the limited number of buttons on that gamepad thing that consoles have.