We just did Jedi this March Break.
Park opens at 9am and we arrived at 8am.
Went to the far left entrance lines destined for Jedi-signup. Being 1 hour early, we were about the 10th set of people in those Jedi lines.
Around 8:35am, they allowed us in, to get to the sign-up place. People ran and form a line again to sign up.
You can choose from the available time slots for what you want (they will tell you if it's available or not).
We chose a 10:40am Jedi training. We like it early because it is not so hot!!
After we have finished the sign-up, we were hanging around at the lake area. They don't allow us to run anywhere. The majority of the park is not opened yet.
Around 8:50am, they walked everyone slowly towards the Toy Story Mania.
We used the morning "free time" to meet Woody, Buzz, Minnie, Sofia, and go to Launch Bay.
Then we did the Jedi Training 10:40am.
Followed by a quick lunch.
After that, we had our fast pass things when crowds are high, and waits are long.
12-1pm FP+ Toy Story
1-2pm FP+ Star Tours
watch show: Frozen
Great Movie Ride
5-6pm FP+ Tower of Terror
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So, to answer your question, we save the morning free for Jedi.
It is because during the morning hours, you can do "minor things" with minimal wait. We didn't want to burn the FP+ in the morning.[/QUOTE