Are you imply'n Hover Nozzle? I think they should just use the default nozzle, imo, but make it better.
I wasn't implying that would be a real obstacle, by the way. I just don't know what buttons would do it. Maybe down b + a?
FLUDD bein' able to be aimed in every direction, includin' downwards in the form of the hover nozzle for vertical knockback/recovery, would mean it's actually useful. I'm in favor of this.