Maybe I didn't explain that we'll enough. Um...
Put it this way. I would like to set up the MFC with 5 patches, 5 scenes and 5 IAs (leaving 16 and 17 as default). What I imagine will be most useful to me for the IAs is to have across the row:
Compressor, drive, amp x/y, (blah), delay
Where I have (blah) set differently by patch. Sometimes it might be a phaser or a chorus, sometimes a pitch shifter, or a rotary or that vinyl effect. I thought the most straight forward way to do this woud be to tie that IA switch to an absolute position on the grid, and then place whatever effect I wish to control there. Maybe it could be done with midi cc messages instead?
Like I said, I can get around this using scenes and there is that cool reveal switch, but I finally got around to setting up my MFC and when I was doing the IAs I thought "Aw, man... I have to decide what effect I want here for all my patches. I wish I could..."
So I put it on the wish list. Maybe I am the only person who ever wanted to do that... (Shrug). Anyway, scenes are brilliant, and I chose a phaser for that spot, 'cause phasers are cool