#1 As mentioned (many times)earlier, Queens are born. Alien-3 states this fact very clearly.
Though the scene wasn't added to the movie, the super-facehugger clearly explained a Queen's origin.
#2 The Queen can defend herself just fine. Just look at her sheer size compared to the other aliens. There is a good reason for this. She's stronger. And the theory that a Queen can't defend herself is void because Queens can detach from the egg-sack just fine. We have seen this TWICE! The Queens in ALIENS and AVP chased after their "pray" just fine.
#3 The Predalien looks way too Predator-ish. Why all that Predator crap? We don't see the Dog/OX alien in ALIEN-3 born with dog hair/ OX horns right? Also, if you look at ALL prior Alien movies, none of the Xenomorphs have PECKS. Why should this one be any different? it should simply have been a BIGGER/STRONGER ALIEN. Not a fusion of the two species.
#4 The new regurgitation method is totally absurd. If aliens has this ability, then the Alien in ALIEN would have done so. Aliens simply CAN NOT DO THIS. If they could, then there would be no need for facehuggers. Adult aliens would be far more efficient at this task.
There are a lot more things that are wrong with AVP:R but those are minor compared to the ones I've just mentioned. I appreciate the "NEW" aspect of this movie, but not if it disregards all the ones that came before it. It's like.... no respect for the older movies, and just do whatever with this one. None of the other 5 "ALIEN" movies did this crap because that's not what aliens do. They make EGGS! EEEEEEEEEEGGGGGGGGGGGGGGGSSSSSSSSSSSSSSSSS!