The Sarries/Newcastle down/up is easy enough. Sarries was already confirmed and Newcastle as good as. Can't envisage any complaints from Ealing/Pirates etc.
Problem then is what they do through the pyramid. Yorkshire are far enough adrift at the bottom of the Championship to make that an easy call, but not so with the top of Nat 1 to replace them. Just looked at Nat 2, and in the southern section there are 4 teams within about 6 points at the top, whereas Caldy are top of Nat 2 North with 25/25, 29 points clear with only 5 to play, so will already have believed promotion was 100% assured. I've not looked any further down than that, but I'm sure there are other examples where promotion and relegation will be very contentious.