Can just make this resume and what I think is just different game wishes and experience you all want from the game:
Me and Beagle and others are seeking a simulator type of game where the xenos are portrayed right and behaves like in the movies and as strong etc where they arent easy to kill like what we saw in aliens where they outmsart marines and is deadly, just one is enough to kill them all if the marines arent paying attention.
Others here seek more arcade and light eharted experience with a mix of realism from the xenos and having fun, typical arcade game and its here Aliens fire team elite lands, and for what it is I would say it is doing it very well and I like how the drone and warriors and other xenos behave but its still far from realistic. On higher settings even runners are deadly andI wouldnt even try melee fight them either.
So you are all right, from what you seek and like from the franchise.
Beagle is right with the game now portraying the xenos fully super realisticly and PAS is right with they got the xenos mostly right and much attention and on higher settings it mostly get the xenos right in how much abuse and deadly they are.
But this is still an arcade game and horde shoter at that, and if we look at other games in that genre, you will kill a lot of enemies of varying degree of lethality, runners became the standard zombie while warrior became the big tank zombies.
that is how this kind of games work.
Its fun but I wouldnt take it as a xeno simulator, in the game 3 marines will kill in one playthrough over 500 xenos, I woulkd argue most will kill 1000 xenos, while 20 marines in aliens struggled against 120+ xenos and according to one of the better researched youtube videos they killed between 50-60 xenos.
same here with weapons and how they behave, now one can use a hand held shield against xenos and take shots from weapons that would penetrate it with ease, heck in the movies even a runner can punch through a heavier metal door, same for warriors in aliens, even the drones in resurrection could punch downa armoured door.
You can activate gadgets so your weapons shots faster or do more damage for certain time or launch a shock wave that throws the xenos away around you, things like this dont exist in the franchise reality, which again: this is an arcade game and then such things are to be expected.
Ina sim like arma3 the mentioned stuff wouldnt fit in, but aliens fire team elite is very similair to what another arcade shoter is doing with fireprof sheilds and classes and gadgets and options: rainbow six seige.