Well, @szufisher as you have already personally learned, the probability of seeing changes that impact the core system is very remote.
They are far too afraid of creating a bigger mess than they already have at this time. That fear has essentially completely paralyzed their ability to even take on the fixing of many of the very bugs they created. That is why the man in charge said they would ONLY consider bug fixes that have been put through the PR system and are already tested and ready for merging, and of course only if they are submitted by the community at large.
I fear that the original design concept of keeping all business domains as part of the ever growing core system has finally grown the system to a size that is probably unmanageable at this time. That means that any little change can possibly ripple through to several unintended other parts of the system. It is probably too late to reorganize the project into a single Accounting system with everything else as add on apps or application modules. This will probably portend a much slower growth curve for the entire project going forward.
At this point I would be just as happy to have the developers behind the new permissions concepts to simply write some documentation detailing how it is supposed to work and provide a set of use case examples.
Other than that, it is not worth trying to fight with the current system.