I thought this trailer was pretty good. Got to see a few new things. It looks like there are spitter aliens at 1:13 that also have small crest heads. As for the other two new types of Xeno we saw, the brown one looks alright, just looks like a brown Giger alien and the other one with the spikes next to it's lower jaw looks awesome! Looks very fierce! The sniper looks ok but I don't think you will be needing that at all really in the game because all the combat is close to medium range.