I think I understand why JP fans don't want Velociraptor to change, apart from stubbornness. The JP Velociraptors were reptiles, but they were human-sized, quick-moving and intelligent, a combination that made them more than just killing machines. If the raptors were just large seriemas with fangs and long tails they still could have inspired fear, but only in the sense of "watch out, the fluffy things are going to eat you!" You can't change the raptors without changing their archetypal role.