Shrinkwrapping, Hadrosaurs never had actual duckbills, idk if they should have made them bipedal, and they should probably have made the crest bigger.

Same as Delta said.

They were mainly quadrupeds that would only run on the hind legs when in a need to go fast. Goofy posture, weird hands and wrists, and crazy shrinkwrapping.

Those legs sooo long