There are some implants which do a poor job of informing the player of its effect and when its actually working. Counter-Intelligence for instance turns the implant icon red but the problem is its at the bottom of the screen and requires breaking concentration on the fight to look down to know if you've been spotted. Others like Sensor Shield don't give any feedback whatsoever. Does it kick in the exact moment i stop sprinting? Do jetpacks fall into the "jumping" category? And countdown timers for ones like Regeneration which don't activate immediately would be the bees knees. Whatever makes implants more intuitive the better.