I've never been an exhibitor so I don't have that perspective. And admittedly my convention-going experience has been somewhat limited (MegaCon every year for a couple of decades, 3 different Star Wars celebrations in Orlando, and a couple of much smaller conventions). What I can say is, out of all of those, the last Star Wars Celebration in Orlando (run by Reed Pop) was pretty miserable from a fan perspective and by far the worst convention I've been to.

The problem is how they run the panels. With MegaCon (and the two Star Wars Celebrations I attended previously), you get in line an hour or so before even the biggest panels and you usually don't have a problem getting in. With Star Wars Celebration (and my understanding is that it is with other Reed Pop run conventions also), you have to line-up, often the night before, to get a wrist-band, in order to line-up again nearer to the panel time to hopefully get a decent seat. They seem to think this is a good way of doing things but from a fan perspective, I can assure you it is not.

I've heard this complaint about other Reed Pop run shows so I don't think this was unique to Celebration Orlando. I don't think the issue was attendance which was ~70,000 for Celebration Orlando. MegaCon has about ~100,000. That was a few years ago so maybe things have changed. That experience was bad enough that I won't attend any convention that does things that way again (though I guess if panels isn't your thing you probably wouldn't care).

Oh, and I almost forgot. The first day I attended Celebration Orlando in 2017, I got there about an hour before the doors opened. It was after lunch before I got in the door. Why? (rhetorical). I mean, with MegaCon I pretty much walk right in (any wait is minimal at any rate). The next day I got there a few hours early so as not to miss half a day waiting to get in. Only because I had already bought tickets. It's like they just don't know how to manage crowds and that's not a good trait for a company in their line of business. Did I mention I hate Reed Pop? :)

It looks like the previous two Star Wars Celebrations in Orlando were also run by Reed Exhibitions but they did things differently then. And better.

I don't think I've been to a Wizard World show so I don't know how it compares.