Except not the mouth of a Pred, just the mandibles. I honestly don't see why the Predalien would be slower, as the average Predator run faster than humans, or why it should retain the dreadlocks. And why would the Predalien have a human like tongue? I mean, the regular, human hosted Drone (Or any host for that matter) has a second mouth there, and the Predators have a snake like tongue. And, if you look at it in a technical view, the Predalien is just a Drone.
Stupidity works in mysterious ways. Its greatest achievement is solar-powered night-vision goggles.