I get what you’re saying here, but there’s a few ways around that for the time being.

Bind one of your aux switches to both Feedback knobs.  Set – for example – Footswitch 1 (Momentary Tip) on Parameter 5 and Parameter 6 at the same time.  .  That’ll work for almost all of the Timefactor algorithms (not the Looper, and Filter Pong would be Parameter 5 only.)

Then adjust the range from Min to Max to appropriate values.  The default ‘wide’ range will toggle between Feedback values of 0 and 110 (extreme runaway oscillation).  A min value somewhere above 0 gives you smoother fadeouts, away from delay buffer looping.  Feedback at 110 can get dialed down for more manageable effects.  I use a similar process over MIDI.  Triggering by switches that send one value when pressed, and another value when released.