I would suggest changing the alien AI to be less direct. The main threat of aliens is that you don't know where they are or when they will attack (its similar for predators but given xenos already have the stealth mechanic it seems a bit redundant to give it to predators as well) but if you get an alert saying "hey mate some aliens are attacking" you can just wait for the maybe day it will take them to all come to you, shoot them, and move on. If instead they prowled around in stealth for a few days, with maybe some method of organized assault or hit and run tactics (ie pack hunting and/or guerrilla warfare) then their stealth would actually be meaningful. The main lethality of xenomorphs is that they take away your agency, thats what makes them scary, but by having the player be notified of their presence and having such simplistic cause and effect AI you nullify that since the player is always certain of what is happening. (or at the very least is never uncertain)

Honestly, it'd be very cool if we were able to play as Xenomorph's. Starting with a small colony and having to build up a nest for the queen, spread it across the planet. It'd be a very interesting gameplay type like that old game Alien Vs Predator Extinction.

first off, just an FYI, but authors are NOT notified when people start their own discussions, and secondly, im afraid, as stated in the description, this mod is no longer being developed.