One opinion is:
There have been rumblings, regarding safety concerns, surrounding the integration of aerobatics in the Sleap ATZ with other traffic, for a while.
The remnants of the committee, for reasons best known to themselves, seem to be inafective in implementing a solution for these concerns.
The majority of the instructors/examiners don't feel it appropriate to fly from Sleap in the current climate.
Independently, some club members seem to be pushing for an EGM to address the same issues.
The airfield is still open and will be welcoming to any visitors. The club still remains open for self hire of aircraft. The cafe is open seven days a week. The museum has only been open at the weekends for a while and will continue to do so.
I'm sure normal service will resume in the very near future.