Like the thread title says. I lost count of the number of times i need to ADS or (especially) perform a melee attack on an enemy when the situation calls for it. It takes several presses before it actually works. And apparently my enemy's melee key works better than mine so they punch me in the nuts before i can do the same to them. I never had this problem before patch 1.2.
Crytek, patches are meant to fix the game, not fix one problem and cause another.

I sometimes get total control loss but put that down to my mouse - maybe it's failing. However I can agree with the melee function, for me it very flaky and I have to mash the button like a maniac before my soldier will strike out. Yet it works fine when I'm not in a head to head fight. I have the melee function assigned to a mouse button and had thought maybe the button was insensitive but it works just fine doing everything else.