That slows down matches even more. Now every time I play I have to go through another menu just to start a round?
No, how it is now is the best.
Notice how there's a "customisations" toggle that would remove this step.
What if I play a game with some friends but then want to change one move? Now I have to go back a step or two, go into the custom menu and then probably a custom move menu and then a character and then change a move?
It's fucking stupid and has just removed the most unique, game changing aspect of sm4sh from tournament play.