To me Scene Ignore allows an approximation of multiples of thirty-two scenes:
The idea of Scene Ignore is flexibility for those who want to have more traditional control. If the essence of the Axe-FX III is to recreate a Bob Bradshaw system, where you can change everything you need with one button, then the idea of Scene Ignore is to give you the idea to break apart that system to make particular decisions separately, perhaps even on the fly. For someone improvising, e.g., maybe all the time based effects are controlled by the Scenes, but your Amp Block Channel has Scene Ignore. Now you might switch between a Tweed and a Plexi when you feel it, but keep your chorus and reverb the same.
This is even more helpful because it allows you functionality to do what would otherwise take thirty-two scenes. To continue with the above example, you have, e.g., eight Scenes of time based effects, but you’d really like also for the amp not to change when the time based effects change, and you’d also like to change Channels on the Amp Block freely without having to change effects, then this gives you that flexibility. If you look at Amp Channels A - D acting separately from Scenes 1 - 8, that’s thirty-two configurations.
I say this is an approximation of thirty-two Scenes because of course, in this scenario, you cannot change Amp Channels at the same time as your effects, but thirty-two Scenes might be confusing and, frankly, more cumbersome, than Scene Ignore.
Now add to this example the Virtual Capo in four Channels, to be controlled independently from the amp and effects. This gives you far more combinations (I’d love to know the combination formula to figure it out), with more power to decide on the fly what changes when, between amps, tuning, and effects. So your flexibility just increased to an incredible degree.