Not sure why people think predators are being humanised. They're no more human now in their behaviour than in the original predator movie.
The whole hybridisation thing where predators use human DNA and that of other species to upgrade their own is not impossible, but a lot of genes would be pretty much unusable because of compatibility issues. But the problem with that is what if the genes that made their trophy kills, superior beings were not cross-species compatible?
Despite the flaws in this expansion to the predators background, I still quite enjoyed this aspect of the film. They're now more than just game hunting aliens as they always were. At least Black recognised that you can't put the genie back in the bottle, and instead made a different kind of movie instead of a dumb ass rehash *cough* Predators *cough*. The only way to "recapture" the magic is actually to just make a new bottle with another genie inside.