Maybe I'm super unlucky
I'm not hurt by this, as I said, aliens hardly hit. It just give away their location, making exploration and combat not so fun.
I mean exactly that, remove Squad Sight for aliens but leave it for player. Why make artificial realism ("increase game dificulty")? Game does not need to be fair for aliens, its need to be fun for player
Situation like this is almost same as playing without fog of war. Anyway its no good for aliens, they could be more successful by sitting quiet and waiting for reaction fire instead of saying "hey guys, we are here!".