Problem is that the hub has limited capacity. If you expand everywhere else in the MK you get to pack in more people comfortably during the day. But when they all show up at the same time for the fireworks, then they can't all fit in the hub. This will be exacerbated by HEA where the hub is the only place to see the accompanying projections.
They are indeed concerned. They raised prices specifically to reduce peak attendance (while still offering deep discounts for off-peak). The one day ticket is surge priced. The lower AP tiers have black-out dates.
Problem is APs and generic tickets lead to awful crowd management issues. Disney don't sell a limited number of tickets for the MK (except for Holiday Party and other upcharge events). So, theoretically, every single person with an AP and everyone who bought 'park tickets' for the year could all show up on a Tuesday in September in MK resulting in tens of thousands being turned away. Would you like to be the one who's turned away at 10 AM because the park is already 'full'?
So, Disney can:
- Regularly cap attendance to something the hub can comfortably manage, which would result in mass hysteria.
- Or, they can start selling specific park tickets only good for specific days that will cap attendance, which, again, mass hysteria.
- Or, they can keep price adjusting so as to create a de facto surcharge on peak times and discount off peak to spread crowds evenly throughout the year.
- Or, without increasing room availability (which they're going to do already, so, this is moot), stuff big E-Ticket attractions in the less crowded parks.
- Or, install a viewing stands in the hub, so, the fireworks crowd can be controlled like Fantasmic! or RoL (no seat, see)
- Or, create a second or third night time show in the MK to divide the crowds (like F! and SWGalactic and Pixar concert in DHS)
I would think that 3 and 6 are the most manageable solutions. Mind you, I agree with what some others have said, raising prices reduces the crowd overall, it doesn't reduce crazy or rude people.