Unfortunately Busch Gardens Tampa has very few rides that aren't coasters or kids rides. The Skyride isn't opening until next summer. The only other rides besides the coasters and kids rides are the train, carousel, log flume, Falcon's Fury drop tower, river rapids, bumper cars. Both water rides can get you soaked especially the rapids.
Iron Gwazi will have just opened that month so crowds could be larger than normal even if local schools are in session. That coaster along with Cobra's Curse and Cheetah Hunt are likely to be the 3 worst lines in the park. Later in the day Cobra's Curse and Cheetah Hunt should have shorter lines but Cobra's Curse breaks down a lot, sometimes multiple times a day.