I do believe I'm getting the hang of the Mod Routings, but wouldn't it be great (and not difficult for Yamaha's Crack Ace programming Team to implement) if we could just change (reassign) an existing Modulation Routing (all of them for a given controller) to a DIFFERENT Controller? (without deleting and reentering copious connection data.)
For example a lot of the LFO vibrato mod (or Rotary Speed Switching) is assigned to the Mod Wheel, right? So, without having to delete and re-enter all of those connections, part by part, to, for example, Aftertouch, or AF1, if we could
Shift/Tap on the Controller name on the touchscreen (to the right of the AutoAssign button),
and be greeted with a "Controller Reassign?" field?
I don't think that is possible as of yet, and I hope this post makes sense.