There's so much of the park you could bin.
Depth Charge, Beach, Storm Surge, X:/TWD, DBGT for starters opens up a MASSIVE chunk of area. Especially if you include Slammer as well.
Making the entrance actually appealing should be their next step. Every time I see pics of it it looks awful. This in turn would work with demolishing Depth Charge and the beach and making a big plaza area with stage and food options. Bit like the temporary stuff at Towers recently.
Then get a good dark ride and high throughput water ride that's actually good.
Oh, and a Top Spin. Preferably indoors.