Good idea! Another similar idea for merging rapid FFA/Solo is to morph from 3 1 -1 -3 to 4 -4/3 -4/3 -4/3 (instead of a discrete transition at 1850 rating).
Not sure about going back to pure 3 1 -1 -3 in blitz though, the 3 player stage would be very teamy again.
a discussion of this topic (https://www.chess.com/clubs/forum/view/separate-rapid-and-blitz) gave me the idea: to separate FFA blitz and rapid, but at the same time to make the rapid according to the FFA/Solo system (border 1850+), but leave blitz as FFA (like now 3 1 -1 -3=> 3 0 0 -3) and remove Solo blitz/rapid as a separate leaderboard
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I think this is a brilliant idea (as in the Russian proverb: you will not praise yourself - no one will praise you
advantages: preservation of the popular 4|0 FFA format, exclusion of farmers in 4|0 Solo, preservation of the number of leaderboards (although I would delete all Solo leaderboards (bullet, variants, anti) and simply add the WTA rule to FFA (as it was before), then the number of leaderboards will become smaller, which is even better) and most importantly it will revitalize Solo
this solves two more important problems:
- Solo without FFA is dead (a scientific fact obtained as a result of a year of experiment). For beginners, an incentive for 2nd place is needed - this is a stimulus for further play and a training court
- FFA 2200+ 1|15D (combined with 4|0) is boring. playing 1|15D with those who got their rating at 4|0 is not interesting, but playing with them at 4|0 is fun, because you yourself start to play poorly (if evaluate in terms of rapid). But I miss those times when I actively played in FFA 1|15D, and even more when I actively played in Solo 1|15D, and I think I'm not alone
implementation: FFA blitz players get their FFA blitz/rapid rating at the beginning, FFA/Solo rapid players get their Solo blitz/rapid rating. then the change will not offend anyone and will make the transition smoother and more acceptable for the start