I felt locked in by the Fantasmic Dinner package, which I'd reserved two months out. It rained that day, and there was some question as to whether the Fantasmic show would go on. However, I couldn't cancel dinner because it was on my credit card. I'd have preferred to be somewhere else and go to Fantasmic on another night. The dinners are scheduled so early. We had to wait around for our PS at Hollywood and Vine, in the rain no less, and couldn't really go do something else because we had these stinkin' dinner PS!! And, they were running late, about a half hour or more, which I suppose might be that common for a buffet meal on a rainy day.
By the time we finished eating, there wasn't any time to do any shows or attractions (kids too young to do ToT etc.) so we ended up going to stand in line early anyway.. mainly to see if the show would go on. Fortunatley, it did go on, but there were many, MANY walk-in people who came after us and got better seats. (The reserved seating is off to the side.)
So, from 4:15 to the end of Fantasmic we ate and saw the show while soaking wet. That's it. I felt it was a collossal waste of time, even though the show was excellent.
We were there the first week in November, if that helps. Not too crowded for big shows like Fantamic, but crowded enough for other attractions. Just my opinion, but unless you were going at peak season, you'd have more control over your schedule if you walked in to Fantamic. There are bathrooms and I think a shop or something at the rear, so you at least one in your party can get up and walk around.