Longtime lurker, first time poster
To a degree I understand why this year's event will be different.
First & Foremost, CMs are blocked out on 8/23. That will cut down considerably on the foot traffic & the parking.
Price wise I understand if people would rather this be a Free event. But DHS usually goes back to seasonal hours by the 3rd week of August anyway because of School back in session. And a 7pm close is normal when parkwide conventions are there. So from a standpoint of it hindering the ability to play in the park longer the point is usually moot by then anyway.
3 reasons for the 8/23 date
1. From what I know, the stage in front of the hat will be up an extended amount of time again this summer. They have to take it down at some point to comply with RC regulations regarding temporary structures, however they want it back in place at the end of September for the ToT 10-Miler. Last year the stage came down and was put back up as soon as they made it past the minimum amount of time for the stage to be down.
2. WDW owns that stage. They only have one. And that same stage is normally also used at NOJ (the stage in the parking lot back behind the Buzz Lightyear Ride) The problem last year was because WDW wanted to have the stage back up at DHS in time for 9/13 it forced NOJ to rent a stage instead. Obviously the only way to avoid those costs again this year is to make sure that stage is available for both events.
3. The first MNSSHP is 9/1. NOJ is 9/5-6. The only way to have that stage available for a Villain's Party & put on an event that won't interfere with MNSSHP/NOJ is to do it in August.