I used to favor USF for having more indoor rides, but Hagrid pushed me over to IOA. Also, it doesn't help that Supercharged and to a lesser extent Fallon have made USF's attraction lineup feel a little repetitive.
Not having Terminator (another show) and losing Beetlejuice/Disaster for F&F did take USF down a notch for me on my last trip. Nice park to walk around in and drink in but I feel if it weren’t for HHN stuff going on as well my ex may have not loved the park, as everything he really enjoyed other than Mummy was past the lagoon, front half of the park wasn’t his jam.
I really feel adding SLOP and a different show (Family Feud?) in for Fear Factor would shake up the park more than people think I feel. The streetmosphere in USF is hard to beat sometimes though.