There are a lot of things they could do with the Studios to liven it up. There is a lot of dated stuff like the stunt show, tram tour, Armageddon etc. that need plussing up until they can be completely replaced down the line.
Re-theme the Tram tour (i.e. more stuff to see), Armageddon, Stich Live, & the Stunt Show around their more mature IPs (Marvel, Lucasfilm, maybe a little Star Wars). Turn the Animation building into a character diining Marvel restaurant, move the Magic Carpets into the Adventureland, as it was designed to go - so the Pixar side can be a distinct area (put someth7ng like a wall-e equivalent in a bit further back). Add more merch shops to hide the big sheds and maie it feel like a city street on the left hand side.
Longer term, concentrate on something that is cool for teenagers to make the overall resort marketable to families with all ages within it. Tron and Star Wars seem ideal for that sort of thing.