Aliens don't have any ranged attack, whatsoever. It's as valid a combat option as any other. If you don't want to let them use it, then avoid letting them getting close.
Since it's just an attack with a tail, I don't see how a cool down time limit would be realistically justified. It's not as if Aliens would be exhausted by using one or anything. Aliens are meant
be deadly and resilient if you let them get up close.
It's like how a lot of people declare 'camping' somehow wrongful, as if ambushing doesn't happen in real life. I recall playing an old game of 'Battlefield Vietnam
' and getting kicked off the server, because a couple of players didn't believe I could see their legs sticking out from where they were hiding in some bushes and accused me of cheating, just because I was using common sense to defeat them.
As for the video, I can't help thinking it still looks like a slightly more polished (but more restricted) version of the last AVP game we got.