Haven't seen the document, but assuming the leagues formed out of the conferences would be 16, 16 & 17 if 5 relegated from Premiership. That would mean in the following season, if another 5 are relegated from the Premiership that it would be 5 relegated from tier 7 and 5 relegated from tier 8 to keep it at those numbers. But even if you're correct, it's a bit unfair for the teams that put in a lot of hard work in the conferences to get to tier 7 only to be faced with 5 relegation spots in season 2. Just to favour the Premiership teams.