I think the new head looks great, or at least alot better than seen in AVP A:R and even A3. The ridges are more aggressive than they were in Aliens though, they look more sharp or spiky. The part I am the most concerned about is the mouth. First of all from what I have seen the Alien doesnt really have "lips". What I mean is that, remember the scene in Aliens where an alien would go to headbite somone and it would have its lips or whatever rise up in a way..... I dunno..
Another thing is the tendons connecting the lower jaw to the upper, it seems like there arent enough and we can see straight into the mouth. Other than that it looks great.
BTW I've been reading these forums for a while but just registered.