That being said, is there enough left in this hobby to support a full-time standalone organization that could stand on its own two feet without the BA supporting it?
I think there is, but the "aims" need to change I think. Back when I first joined, I worked on the 2001 AHA NHC here in Los Angeles. We were thrilled that we had 500 people attend the conference! We were hot s***. The conference and its expenditures were scaled appropriately to that level of participation. And then of course, over time, it grew and grew and grew. In part due to efforts of the AHA and in part due to the natural evolution in the hobby.
The conference went from being put together by a local committee with guidance from the AHA staff, to being run by the AHA staff, to being absorbed into the BA Event Planning staff (i.e. the same folks who run GABF and CBC). I think that worked well when the conference was banging out attendance in the multi-thousands, but now that conference participation is waning (and it's not just a beer thing - it's down across many hobbies/industries - I haven't gone to a professional conference in years), I don't think the BA staff is the right choice for running it. They aren't setup to do "small".
Ironically, it's the same problem that big brewers faced around craft beer - they have the technical expertise to pull it off. ABI could make a dynamite {whatever style you could dream of}, but the people running the company would consider any beer brand that isn't selling 100K+ barrels/year a failure.
I feel like the org needs to be allowed to pull back and get more loose and hippy dippy grass rootsy like it started. I don't think these changes make moves in that direction.