I find the (very short) delay when switching patches to be of little importance to me. I prefer having multiple patches per song. Because of DSP limitations, this set up allows me to cover a wide variety of tones & effects, guitar models (Variax), volumes & tunings (Variax) in any given song without having a programming and/or tap dancing nightmare, never mind having to remember whats what when playing live. You want me to remember EIGHT buttons ? sheesh !
I specifically & religiously use > A-Clean, B-Rhythm Crunch, C-Solo, D-Special (Acoustic etc.) I do the same with my FS assignments in any given patch > FS1- Drive/Dist, FS2- Modulation and so on.
Most songs only require 2 patches, but some, LIKE Spirit of the Radio in my opinion would require 3. 1A-Intro, 1B-Rhythm/Clean, 3-Solo
That way i always know what to step on without looking at a 31/2" screen from 6' away. I set my screen view to show me bank & patch only, & mark each song on my (paper) set list for stage with the bank # & patch letter i'm using to start the song.
It just brings some consistency & predictability to my switching, and takes away a lot of guess work during a performance, especially if your bands song list is always changing on the fly. If any of you have worked with a lead singer, you'll know what i'm talking about. :D