I do like the concept employed, but even though it's a fan concept, I don't feel like it really relates to the AvP universe at this point. Some powers could be edited and removed, and I don't mind if you follow or ignore the critique shown below.

They should keep the shapeshifting for certain, since those over all abilities seem to make them unique. I'd rather not restrict it to 'hot' looking humans, but maybe they instinctively have a preference towards turning into the physically attractive of one species. Once they take a 'DNA Sample' of any species through contact [mainly blood through wounds probably], they can turn into them. Rather than making it instant shapeshifting, maybe it could be like 'shedding' instead. In that case, it's more reminiscent of a snake in how it sheds its first layer of skin to practically change into the 'skin' of the target its shifting into.

The fastest a Xenomorph has been could probably be a bit under the speed of sound [subsonic speeds], as they've moved faster than a camera could record them. Every plane has a different flying speed, so your statement is quite vague, but I'd assume that'd be around 450-600 MPH. In dry air at 20 degrees Celsius, sound is much slower, so they could possibly outpace the runners, who are notoriously known for their capability as the fastest known Xenomorph. Due to this, I think this Xenomorph could rely on gliding more than flying, having inferior stamina that makes them rely on gliding to conserve more energy, keeping their top speed in the air but retaining slower speeds on ground.

Acidic saliva's basically replicating that of a runner's, so I'll let it slide.

When does a Xenomorph ever knowingly have knowledge of your weakness? That's like, top psychic stuff [which is in turn supernatural and not science fiction, for the most part] if they were to fight you for the first time. No, this could certainly be replaced with something else. I'd say give them the genius of regular Xenomorphs, having expert memory and deduction abilities to figure out someone's perceived weakness quickly. Their general intelligence could still probably be inferior to that of humans, so I'd see them using "process of elimination" much more after making a theory on what their vulnerability is.

Stealth and Night Vision are well known abilities of the Xenomorph [if I remember correctly], so vulnerabilities should also apply. I'll let it pass like acidic saliva, since it's essentially canon.

How could we define these aliens as powerful? Are they strong, fast, intelligent? Why do they have unlimited power? Personally, I don't think it remotely fits in the AvP environment, as all of them have unlimited power. I believe most of the fights involved intelligence on the human side, so if they had unlimited power, I'd've just expected domination by now. They can't lose, because they have unlimited power.