AnFI, the possibility of LAPL/PPL/BPL/SPL training being conducted 'outside an ATO' is several years off. The rule making task programme will first need to decide on ToRs and scope, before forming a working group. Then any proposals would go through the statutory processes following comment response.
So you can reckon on about 3 years from the moment they begin any work.
Objecting to NPA 2014-28 now will merely make it much more difficult for RFs to convert to non-complex ATOs - a process which is considerably simplified by the NPA if you read it carefully and note the differences to the current requirements.