To give you an idea of what you can get done in the morning, yesterday we needed to leave the park around noon to catch our flight home. We were staying at the Beach Club and didn't have to rely on Disney transportation - so we walked over. The biggest thing is doing whatever everyone else is not doing. I will never understand starting off your morning waiting 90 minutes for MMRR when the wait doesn't drop significantly during the day. If you have to do that wait regardless, it makes a lot more sense to knock off other rides with lower waits in the morning before everything has a long wait.
8:25 - in line at the park, about the tenth group in line.
8:50ish - security moved up the line to the temperature checks
9:05ish - temp screenings started
9:10 - in line for MMRR
9:30 - off the ride
9:40 - walked on to Smugglers Run, off at 9:55
10 - waiting outside Toy Story Mania, grabbed boarding group then walked onto the ride
10:25 - in line for Tower of Terror (we waited 45 minutes for this, but it's my favorite ride and I wanted to do it once more)
11:30 - in line for Rise of the Resistance
12:07 - off ride, power walked it out of the park.
We had spent 3 other days in Hollywood Studios. Wait times do not significantly drop until the last two hours of the park. In the middle of the day, we were kinda bored waiting around because we just don't care to wait in long lines. There were even times where Muppet Vision 3D had a 40 minute wait because of capacity in the theater. We did make sure to make lunch reservations each day, watched the Mickey Vacation shorts, and spent a lot of time enjoying walking through the One Man Dream's exhibit. If I could go back, I would rope drop, leave around noon, and come back around 3.
Also, I really think you need to be able to line up early like we were able to in order to get this much done. Parking and the skyliner guests start coming in a little after 9, and by 9:30 MMRR has an insane wait, and Slinky creeps up to 75 minutes really quickly. So, if your only option is to get to the park around 10am, it may very well be better to wait until the afternoon depending on how you want to plan your day and if you don't mind waiting for rides.