AI maybe is dodgy 10% of the time when they land grenades at their own feet, but silenced weapons should do crap damage at range and your cloak should be unreliable if you don't know how to use it ( e.g uncloak - recloak right in front of an enemy ) cloak in crysis 1 was way too reliable and the whole game was so easy and imbalanced thanks to the overpowered nanosuit that i finished it in less than 6 hours at delta difficulty, even Doomlord's AI tweaks didn't help much. It was a design issue mostly.