Being able to use more than one switch to toggle the same effect/block is the first thing I missed from my GT-10! Really an essential feature for me too.... Can't believe a unit of this quality lacks this flexibility...
As for "We do this because otherwise, it'd be really easy to get into a completely jacked up state where mental gymnastics would be required to get back to where you were." Well this was never an issue for me before, and if you get into a state, just leave the preset and return to it and you're back to the default saved state...?