I liked RR, it just seemed to work better in the real world where shifting is rarely perfect and you don’t remember to ease it accross gentlty.
Probably wouldnt work with a clutch though as that already slows the downshifts. Or it would need either;
a) much stronger spring
b) a cluch that sensed the gear change, eased off the chain tension, then locked again when the next gear engaged. Would either mean 2 lots of indexing, or rolhof style indexing in the mech.
I give it one more revision before XT becomes a pinion style gearbox, with XTR remaining as chains/cassette/mechs for max efficiency on race bikes and <SLX the cheep dereilieur option. A bit like Ultegra getting hydraulic Di2 rather than Dura Ace.