Its not management. Its guests that check in late, show up with more people then their ADR, check in without their whole party or camp at the table. The computer quotes times by how long a guest has been at the table. What do you want Disney to do? Put a time limit on your meal? Oh that would go over real well.....
Sometimes that would be nice...
One thing to remember is an ADR is not a reservation for an actual time, as it would be in the real world. What it is supposed to do is give you the next table available for your party size. The problem is, especially with character meals, is that people like to linger. And a few people taking an extra 15 minutes or so throws everything out of whack.
You can't compare Disney restaurants to off-site restaurants. They serve more people and have characters and photos to juggle as well. Whole different animal.
15 minutes I can handle. No worries there but yes, as my above comment, a few minutes lingering because of pictures is fine. Lingering from a 6:30 seating until 10:30 to watch the fireworks so that someone who made a 9 or 9:30 ADR to specifically be able to be seated to watch them, yes, I have a huge problem with that. And being a former server and owner, I would think the restaurant would have an issue with that as well, based on turnover times and guest satisfaction issues.
I like to pace my meals, like Bistro and CG and other places. But, for a buffet meal or family-serving like Ohana's, that isn't pacing. That is flat-out taking advantage of a situation. Can't get the 9:30 ADR- take the 6:30 and not leave until 10:30. It'll be okay. It is not unreasonable, even if they were seated at 7, for them to be done by 9PM. That's 2 hours. Even 2.5 hours is one thing, but then you are infringing on someone else's time slot.
In this regard, I think Disney should be smarter in this regard- much like V&A's post their estimated time frame for a meal, so should all the other popular restaurants, as a suggestions. "This meal is recommend for diners wanting a meal of an hour or less." or "This meal is an estimated 1.5 hour time..." or something. Or "If your party hangs out here for 4 hours, you will be charged a 25% tip and an extra credit per person"- that would really make people think about hanging out.
(I am kidding about the last one...but it would be funny to watch someone's face until they got
)
I guess that's why I prefer lesser-liked TS or more CS meals anyway.