TL;DR: now I agree on another upper league.
Ok I think that after 12 days things are settled. It is obvious that under 1400 players do not have enough Xp levels and may be very frustrated. the ones xp level 7 that go down go up immediately against those.
Moreover the elo inflation extended the master league and while the activity 1400+ is not a lot, it is neither a little, considering than casual "+1" helps mostly no one.
So, after more experience I declare my statements void. I would create a "pre master" league (instead of grand master. Master is already pompous and does not give the idea that the players have to prepare for the next one) to collect those between 1200 (falling) and 1400.
Diamond: max 1300, min 1100
Pre Master: max 1400, min 1200
Master: unlimited, min 1300
Since the 200 delta score, this would mean that (a) a lot of people in the master league would fight the pre master, while the top would be really master; (b) limiting the score inflation even more (there would be still, but slower).
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