I upgraded my m2 to flyme 22.214.171.124G, but after some days of using it, conclusion is Flyme 5 it is crap. Definitively.
Slower than v4, forced having a recent app drawer (which is real offense to privacy, and unremovable), overcomplicated (access to contact groups need 5 click whereas in version 4 need two !!)
No android kernel updrage, just adding crappy things everywhere, from contacts to alarm through app manager.
So how to downgrade ? I wouldn’t like to do a factory settings, wasting again my time reinstalling everything…
Whatsoever, Flyme 5 is pure, real, crap.