Please, you must be joking. That be boring as shit.
No it wouldn't. It would be balls out tense. Especially if the flavor only discourages and does not kill the aliens. Limited and finite resources generates tension.
No, not really. Maybe I am over simplifying it to the point of dumbing it down. But I'd rather not have TOO many weapons in a game mainly about horror. I'd like a slow build up and not a balls to the wall action game if it is really based around the A L I E N time frame and/or film. It's just an idea any way, doubt they'd actually take my suggestion into consideration and do that.
Indeed! Just going by the original Alien, you could have primitive motion trackers, cattle prods, flame throwers. The space suits for EVA sections. Hand held torches. Plus all kinds of interesting extrapolations from there.