The problem with the scene where Jesse gets pinned, is that it was so rediculously unrealistic. Not to mention it wasn't much of a shocker to those who've been following the film since it's inception. Which I'm certain was the vast majority of people who went to see it. lol i.e. the fans.
Regarding the Pred-Alien, as if the dreadlocks, predator's skin tone, and the absurd new reproductive method weren't bad enough, they were trying to give the Pred-Alien the ability to cloak and have "her" skin and hang victims.
I wouldn't be surprised if at one point they tried to give it the pred's signature dual blades on it's tail or hands like some of the god-awful concept designs from the '90s. They should all be drug out into the street and shot. lol