I was playing a little more with my curvy copter, and found the true Jumble move for SALOW:
UR+ RF+ UF UR-' RF-'.
It isn't UR+ RF+ UF UR- RF- since UR- is two moves away counter-clockwise from the neutral position. Executing the Jumble as "UR+ RF+ UF UR- RF-" would result in the cube being in the permutation of UR-' RF-'.
I can expect to see variants of UR+ RF+ UF UR-' RF-' being used in scrambles, along with "non-sequitarian," or "NS" jumbles or jumbles that don't end in the inverses they started with, and "Unusual" jumbles, where the first two moves don't match direction.
An example of a pure "NS" Jumble: UR+ RF+ UF UR+' RF+'
An example of a pure "Unusual" Jumble: UR+ RF- UF UR-' RF+'
An example of a combo Jumble: UR+ RF- UF UR+' RF+'
I hope this could lend a hand to adding complexity to scrambles.