I don't get what's the big f**king deal. Doesn't every species evolve? Things change, to say that they should always stick to old ideas is lame. You have to bring new ideas to the table in order to keep a franchise that is over 30 years old fresh. Sometimes it doesn't work, like some ideas in AVP, and sometimes it does. It remains to be seen if Strauss' ideas for AVP-R work or not.
Anyway, somebody please tell me why it's sacreligious, blasphemy, to have more than one chestburster. The Predalien impregnates her, not 3 facehuggers. If that was the case, ok, that would be dumb, but they are introducing a new birth cycle, it's a new kind of hybrid, so why wouldn't it have new characteristics?