They may be a little busy with a big project that will have a LOT of animatronics. If it's a choice between building something new for the existing park or building something new for Epic, there's a clear priority.
All three herbivores were odd choices when the OG Hollywood version first opened. Ultrasaurs aren’t in any of the movies, stegos didn’t appear until the lost world which hadn’t come out yet and looked nothing like the ones on the ride, and parasaurs only got a 2 second cameo from very far away in the first JP. It would’ve made more sense to do Brachiosaurs and Triceratops.
This is a question I've always had too! From what I can tell looking at old home movies posted on YouTube from around the park's opening, it has always been like that (but please please please correct me if I'm wrong, as it is really hard to tell from limited early IoA videos).
I also don't think it's a copyright issue, but different uses of the same song do require different licenses so technically it wouldn't be out of the question.
It might just be design oversight. Hollywood even had Raptors in the Kitchen playing inside the showbuilding at the top of the lift which is also somehow missing from ours. I also think it’s weird that we don’t have film accurate Dino-noises like Hollywood had. Some of the Dino noises sound more like a Bill Nye episode they’d show you in 5th grade.
