Plus we need to know what time of the year you're going.
People ask a 1 sentence question, and the answer involves many variables.
There is 1 big show at IOA, The Eighth Voyage of Sinbad. There's a kid sing-a-long in Suess Landing, and if you wanna count the Triceratops encounter as a show, I guess you could. I think the people forgot you we're talking about IOA. Over at USF, there are many shows and you need an entire day to see them all.
Back to your arrival time, 11am is the worst time to arrive. That's when everyone is showing up, just like you wanna do. Sure, you have FOTL, but at noon, the park will be packed. I'd really suggest you arrive at 9am when the park first opens, take a lap around the park, and at noon, you'll notice it's full and you'll have to dodge people in the walkways. That's when you can use FOTL to get a few more rides then come back to your room for a rest.