That’s a good answer. I did not know about re-rendering.
Instead of referring to a control surface, I should have said Logic’s Smart Controls, where, if it was assignable, the width could be adjusted right in the Main screen, side by side with other significant parameters like wet / dry. I certainly didn’t want to automate Width as the playhead was running.
Adjusting such things in the MIR interface is only problematic when numerous channels and several instances are presented to the user in a final balancing pass.
Thanks for considering it. Perhaps this and positioning could be made available by remote with a caution noted in the manual that it is not intended for real-time playback.