Ork stomp party! I do like the interruption and short executions idea though. It gives a way to reasonably dispatch your enemy in a full battlefield, while still keeping the brutal execution for the atmosphere.
So hypothetically if down players can't move on their own an ally can come over and move them by holding E and either carry them or drag them away from danger. View: http://www.youtube.com/watch?v=9nXyv8W3XnU I don't know if is possible with 40k proportions
Another important thing is if your going to not be able to take damage during the execution animation or it will be interupted by damage? Will executing some1 give you a small life bonus?
Yes you would take damage its risk vs reward. Although with the ability to just drop them till later lessens the risk to the executor.
Much like GoW had it. They always had a quick execution button (gnasher quick smash to the skull) and a longer/finisher execution (curb stomp/sniper rifle exeution), and a 'I'll slap you with my **** execution with all my pals' (arm ripping & beating execution/orks) execution. Like it was said, that way you can still be shot during an execution. Its up to who is trying to execute the person, its there fault they try do the longer execution in the middle of a fire fight out in the open. Co-Op executions anyone? Could be fun. but makes both people very vulnerable.
Being able to stop Executions at any time is a great idea. Also, getting stomped to death by a lynch mob of players.. with XP bonuses to encourage massed stomping.. NICE.
Being able to stop executions sounds useful as well as realistic adding slightly more depth to the game, I think it would be a good addition! Also after reading this thread I never want to be downed in a mob of players, you know... because I enjoy not being foot pudding.