Pettis, Ferg and Felder (I think) can turn most lead kicks into spins if you add the backfist.
Barbozas lead switch kick does it on a clean miss, but I agree. I think it'd help on leg kicks, especially as if you shoot after they miss, you get the animation of the instant spin counter TD from UFC 2. Same with body kicks, it honest looks like you'd get a quicker reset spinning through it as opposed to that hard reset they currently do.
Also, can spinning elbows and backfists be interchangeable after I kick.
I'd love to be able to miss a kick and spin into an.elbow if the fighter has it.