The 'revised' models are a little confusing. Normally you upgrade models in such a way as to 'persuade' existing owners to 'sell' and upgrade. That certainly doesnt seem the case here. So what is the reason? Some have suggested that it relates to a lock down in firmware - possible - time will tell.
My personal 'guess' is that it is pure marketing. People expect 'new models' from DJI at this time of year in place for the run up to Christmas. If no new model appears maybe buyers hold off buying on the basis that they are 'just around the corner'. These forum are littered with 'should I buy now or wait for the
Mavic 2?' - I suspect over at the Phantom forum it is even worse. So I suspect it is DJI simply 'telling us' that there are going to be no new models except these cosmetic upgrades - so that people dont hold off buying if they want a drone. They dont particularly need new models as they are well ahead of the competition.