I've leveled up cloaked to gold 3 times and I feel your pain. But having the kill happen at the start of the animation would leave us with virtually no way to escape revenge as we would be halfway through the animation when it'd explode. So I vote leave it the way it is.
To accomodate Revenge, why not give the medal as you choke him? That's halfway through the animation, so you should have time to run or throw.
Hm, this sounds reasonable. Or just allow us to throw back grenades during the animation.
Totally agree. Leveling Cloaked is already hard enough but when I start to snap a dude's neck and the kill is taken that is just unfair. It doesn't happen incredibly often but when it does it is just annoying.