Here are my tips for quick fixes…
Add some actual larger than life dinosaurs to Jurassic Park … like every “prehistoric” Mom and Pop park, or local science museum has these.
Paint that minions ride ASAP. Try yellow.
Add some tall Barancles that can provide shade throughout bikini bottom.
Add some static figures (or hell cheap AA) and install throughout the Shrek ride.
Agree. As much as I don't care for this park, I also do not think it's beyond being salvageable - especially because a large percentage of the park's problems seem to be cosmetic. To everyone who keeps up the tired argument that the poor theming is somehow forgivable because "It'S foR kIdS", I keep arguing back "Kids deserve quality theming (!!!) and kids, more than anyone, love bright colors and visuals that pop!"
I second all of your suggestions and also add/expand:
- The first and the MOST NOTICEABLE issue with the easiest fix: the unpainted concrete. It's dull and lifeless and looks cheap. The fix is easy: paint all the concrete in each land...or at least 75% of it. Give each land it's own specific color concrete: SpongeBob should have blue to further sell the idea you're under the water, Shrek = green for the swamp (especially in that playground, no reason for the swamp splash pad not to have green concrete), Minions =yellow their SIGNATURE color etc.
-Next, add some life with audio enhancements. At the Splash Pads/Playground areas, add some creatively hidden/decorative (and waterproof) speakers that have the characters' voices talking throughout, maybe saying some signature lines...dinosaurs roaring. etc. This would help go further with immersion. You really want to get all senses going...this includes auditory.
-Add some temporary cool off areas: If you're going to wait 5 years for the trees to grow in, build some temporary shady "cool down" spots. We've seen this at other parks before where they retrofit underutilized areas in the park to offer shade... the only issue is this resort doesn't have any areas because they didn't build any. So, put up some canopies, add some temporary seating. There is no reason families should be suffering under the Texas heat like this if you aren't going to build any indoor attractions and show buildings so at the very least, add some stretches of canopies and seating with fans to offer some reprieve.
Those are the more immediate fixes I don't see how they can't fix quickly.
Now more long term..
-Indoor attractions: Obviously they need to do something about indoor attractions. If there's thunder/rainstorm or if there's sweltering heat, there are no indoor options. Build it. If they can't build indoor dark rides (as rumored but seems to be largely debunked) there is no reason I can't see why you couldn't add an indoor theater. This could be a mix of live shows or 3-D/video shows...but it would go a long way in terms of offering more variety than the outdoor carnival rides.
-Add more Street experiences/immersion/outdoor shows: More character interactions. Why not try to do with the characters here what Disney is doing at Hollywood Studios in Animation Courtyard with the roaming characters who play games with the kids? Have some more interactivity and creativity here. Also, a parade? A projection or fountain show? Give us something to make it feel more alive.
Now none of these suggestions seem over the top...these are fixes that should be extremely do-able (the top ones, easy refurb shouldn't take more than a few months, and the ladder long-term no more than a couple years) and easy and would really go a long way that would allow it to still cater/center on "The KidS" while giving the park goers who have come to expect a certain quality from Universal, the quality experience they deserve.