For me, it wasn't so much the weird abilities all the variations of Xeno had, but that they all look so different and the designs are awful. If all the xeno's looked the same, but could do different things, then it would make things interesting. You wouldn't know if it was going to explode, or shoot acid at you from a distance or whatever. But instead, you can see the variants from a mile off so they lose all surprise, and you can just exploit whatever each one's weakness is.
Also, it would look a bit more truthful that they were making a canonical sequel to Aliens instead of this blatant lie which they still keep telling.
On a whole I thought this was the best approach to a trailer they've done in a while, but it still just looks really bland.