I may have just discovered the first shortcoming I've had with the MWBD Pro.
Can't turn off the expression input at all, let alone on a preset basis. (Whereas the hothand input can be disabled.)
So if you have a multi output expression pedal that can control other pedals at the same time (like, say, the new SA dual expression), you're gonna get the morphing on the MWBD Pro whether you want it for a particular preset or not.
The only way I see around it is to clone any preset you don't want to morph to the one "underneath" it, so it ends up morphing between two identical sounds. But that means giving up a precious preset.
Or am I missing something? Some hidden way to turn it off? Some clever trick to get around this? I do want to be able morph between two of them, but not any of the other four.