I think that, along with basic upkeep, they need to make certain parts of the park better-rounded. For example, if you don't want to get wet, you have no reason to go to toon lagoon. One ride that you stay dry, even if it's a small flat ride, would be a great addition.
Honestly, I would be stoked if they just put a little shade in Seuss. I never want to hang out in that area because I'm always baking