I agree, I'm just worried that we may end up with or waste time on a complicated/exploitable/pointless mechanic. I mean if fire multiple shots and or volleys at an alien they're either gonna be dead, wounded (tho this only helps if being hurt affects accuracy like in the original(does it?) or they are going to be one of the tougher aliens that can't be suppressed anyway.
Its still a deterrent because you don't know how much AP they have left. I guess reaction fire is more like area denial then proper suppression.
I'm not against a suppression mechanic, just as long as its simple and isn't too crippling.