Similar to the fireteam for pickups the Predator should have a brief period before he/she stealth kills. Perhaps as quick as Fireteam picking up currency or a bit faster but Predator shouldn’t just tap the button for stealth kills. I suggest this because mid-firefight Predator shouldn’t be making an unrelated B-line for a stealth kill while swinging wrist blades because an NPC happened to have his back to the fireteam member I was actually swinging at.
Just holding it down for a bit to get a stealth kill rather than clicking would keep the fight going rather than giving the fireteam an immediate win due to a poor design choice.