Could we have some awesome sidesteps and shadow-dodging instead of the old roll? Maybe have certain frames have different looking dodges and side-steps and dash-dodging.
Make them unique to each character, like if Ember does a dodge/roll, double-jump or something, she's on fire or something. Volt can be all lightning and electricity when he dodges left and right with lots of electricity and particle effects.
Ash could dash forward almost like slash-dash but he's a shadowy smoky figure or something.
The old roll is just been around forever and it'd be refreshing to change it up.