What you are asking for, interferes with the present concept.
The present concept allows for assigning multiple effects to a single button and toggle them from where they are. One effect could be on, the other off. Pressing the effect button will then swap the effects.
Your concept is about an effect scene. A certain state of effects is realized with the strike of a button. A different scene would be assigned to a second button.
If we realized both at the same time, a first button would alter a dedicated "toggle scene" of a second button.
I hope I could describe the problem in short words. Please consider it.
If you like, I give you an example.
An example of the alternative work flow, Mr CK.
Switch I has A and B (both in Off status when the Rig is recalled/ Press the button, and they both come On))
Switch II toggles C and D (C is On when the Rig is recalled - press the button, and C is turned Off, and D is turned On)
Switch III is X, MOD, Reverb, Delay (all four are in On Status when the Rig is recalled)
Switch IV is still available.
Within the present architecture, I have assigned all available slots to one of the stomps.
There could be a situation where you might want to combine slot D and the effects on Switch III when the state of Switch I is toggled to C on. This situation would take two footswitch presses. And let's say there's a time when you want to turn off A but not B, how would you do that?
Currently on my floorboard, I can make multiple combinations of effects and pull them up with a single press of a button. This is far more intuitive than having toggle capabilities, imho, since I can turn on whichever effects I want and if I jump to another stomp, it recalls an entirely different combination of effects. I can do this with five effects simultaneously, and I can easily call up a rig where each of those button presses has the maximum impact.
I like to look at the floorboard like a stomp box controller of sorts. In that sense, it would make sense to be able to recall a selection of stompboxes with a button press and instantly recall another configuration with another press. It's a cinch with my board, where it sends a 1 to all assigned stomps when a button is pressed, but if you step on it again, or press another button, it sends a 0 to all those stomps.
A simple demonstration with midi, Mr CK.