But Dreamworld is not even in the same ball park as Disney. Disney's various parks are all about the IPs. The reason you go to Disneyland is for the immersion with the characters and worlds that Disney as a brand represents. You wouldn't go to Disneyland if you wanted to ride a world-class thrill coaster, you'd go to Six Flags. As you may notice, the focus of Disney Parks (at least under good Disney management) is therefore on experiences rather than just rides, theming, and high-quality experiences that immerse guests with high attention to detail. On their surface, Disney rides are sometimes pretty unexciting machines, but their quality comes from their world-class immersion and detail.
Dreamworld, even when it was inspired by Disney somewhat, has never been that. Even where they have used IPs such as DreamWorks, they have never been focused on such in-depth theming, but rather on having a variety of rides and experiences for the whole family, even where they are just that - rides or shows for the sake of having rides and shows. You'd never see anything like Tower of Terror at Disneyland, it would be considered one of their weakest attractions. But at Dreamworld, it was one of the strongest. Disneyland would also never install something like The Claw or Steel Taipan, where the theme is more of a vague aesthetic with some sort of implied theme, but at Dreamworld, they fit right in and are quite popular.
The closest you could say Dreamworld have to a cohesive "theme" is the Australiana vibe which has long since died, since the removal of Gold Rush and arguably even earlier. And even then, that was more of an aesthetic than a theme in the Disney sense. Rides like RHLR and TRR, while some of the most "themed" rides in the park, all had implied stories and vague aesthetics designed to just be appealing to the eye, not to necessarily immerse guests.
I think it's pretty clear Dreamworld have never been remotely similar to Disneyland, and post-2016 they seem to be headed in a new direction that deviates even further from that. Comparing Dreamworld to Disneyland, and RHLR to Mickey Mouse (?) is comparing apples and oranges.