On my GT1000 Core I could rapidly scroll through 125 presets by rotating a footswitch. So I could go from preset 30 to say preset 70 in 2 secs.
On my new (otherwise fantastic!) QC Mini I only seem to be able to presets one at a time by long pressing TWO footswitches. Or switching out to the Directory.
In preset mode, Footswitch A or B could very easily rotate to scroll through all the presets. PLEASE make this happen!