EM5 -quick way to switch to Myset 1??
I indeed have set Fn1 to a myset that activated 5 shot 1 EV bracketing. I too wish the button would toggle off an on. After all, this is what happens if you set Fn1 to AEL/AFL.
The problem with Fn1 is that it is so awkward a location because of the excellent rubber thumb grip, that to press and hold compromises my grip on the camera!
... so, I too find myself going into the menu to use myset2 for bracketing and then go back in to myset1 to go back to my default non-brackeing settings.