Sorry, I wasn't understanding what you wanted from your previous description(s). I think I get it now.
Here's a possible workaround in the meantime:
Just tap tempo on either your Space or TF in play mode on the pedal and send the tempo to the other pedal over a MIDI cable using MIDICLK. This way, you have Play on the pedal, Preset mode on the Aux Switches, and you're still able to have your pedals tempo-synced.