My verbfactor wish list:
Midi IN/OUT – I'm not aware of any verb pedal that has similar MIDI control
And of course, the expression pedal is a must!
Octave/verb kind of thing (octo setting on Verbzilla..or crystals, although I'm not familar with it)
Multi-tap delay/verb (like timefactor)
…. That's all the types of verb I can think of… Surprise me.
The ability to have 3 presets across the bottom would be cool.