1. Remove the Dreadlocks (only Dorman`s predalien looked good with dreadlocks).
2. Change obvious human teeth for predator ones.
3. Change mace tali (I liked wristblade-like tail of Dorman`s creature).
4. Make Mandibles X or T shaped. They suck when they are just glued on sides of mouth.
5. Change the color.
First five things that came to my mind.