...the original Dinosaur, Dig Site and Restaurant work well with the park and of course the Dig Site Coaster would have tied it all together.
It’s the carnival that is so jarring…. Again that was partially by design but I get why so many people are against it. It’s a stretch to make it work at a Disney park.
Indeed, I think one of the biggest issues with the carnival is that you shouldn't have to understand the backstory of a land in order to appreciate it.
One thing Imagineers have said about Disney environments over the years is that they should work
both for guests who are experiencing them casually (without paying attention to the backstory)
and for guests who want to dive deep into the backstory.
In the case of Dino-Rama: If you learned / figured out the backstory, it at least makes sense and is technically immersive. If you didn't learn / figure out the backstory - which I'd hazard to guess was the vast majority of guests - it really did seem like Disney threw all its design principles out the window and built a Six Flags -level amusement park area. Indeed, I've actually read reviews that said things like "wow, Disney didn't even bother to remove the parking space lines."
They could have made it clearer by doing things like, say, having a big sign at the entrance to Dinoland reading "welcome to our small town where big fossils were discovered and The Dino Institute was founded." That would have at least made things less bad.
Of course, even aside from all this, it simply clashed with the
aesthetic of the park - and the calming/reassurance/non-chaotic aesthetic/feeling that Disney parks aim for in general.