Hi,
Snapshots do kind of do it but then I have to go into 4 footswitch mode, unless I buy and connect an external footswitch. I'm trying to do it all within one preset so I still have 6 footswitches to control effects. Snapshots also mean I have to press a button twice to go up 2 Snapshots, say to Overdrive, and then twice again to come back to Clean which is a bit awkward.
(I wonder if there is a hack you could make to the JSON files to get one switch to switch off two others? )