1. Well, why call them normal animals then?
2. I don't care, they still should have killed atleast Paul to show they're serious and not just "wanting their child back". The Raptors barely killed one human(plus meaby Ben off-screen). Softening them up from the past monsters barely makes them more freaky. So, regardless of what, the Raptors should have retaliated.
Regardless if they're genetically engineered or not, Raptors don't make proper enemies to Aliens. Because they don't deliver fright as well nor perform well enough against such a lethal enemy. Theropod dinosaurs are badly overrated now anyways, barely making a decent prey for the Predators. So, in case such a fight was commenced, I'd rather see the Yautja hunting some dino for their display.