The only way I'd like to see Fists of Fire stay really is as a visual effect lol.
Just make it replace Riddle of Fire but with the same effect and make your fists actually visually be on fire.
Just makes more sense on a thematic level.

Just on a visual level I think Monks are in need of an update, Bootshine, True Strike and Snap Punch in particular look so visually underwhelming and not like we're these ultra masters of doom.
I also have the same problem as with Dancer which is that the animations just stop if you move in certain ways ( which we do a lot ).
Just looks really awkward when that happens.