I'm not entirely convinced there will be significantly more of a need if RFA is told to quit it with the demands for shrubberies - such a need that we would need rules in place first, rather than defining them as the need shows up.
The need hasn't been shown as yet.
There's a big difference between getting rid of some of the more excessive requirements at RfA and handing out the mop to anyone that's been around long enough without getting blocked. The first shouldn't require any major changes in desysoping process. The latter definitely would.