Something of a feature request if its not already possible (havent found a way atleast), with the v4+ i understand there are more resources to use, so this might actually be doable i hope!
A "performance page" for lack of a better name where the knobs and buttons turn into "programmable" controllers which send output to where they are assigned.
ex,
knob 1 = midi output 1, chn 2, cc 60,
knob 2 = USB 1, chn 5, cc 45
knob 3 = midi output 2, chn 2, cc 61
etc....
also the buttons could have triggers on them, assignable in the same kinda way, send on/off's, program changes or just control mutes (custom groups or similar), turn on/off fx and other features on the sequencer.
The bottom row could select between different pages even, perhaps have page one to control synth x, page 2 could control synth y, page 3 could a mix of different things such as internal sequencer features and multiple external controls and so on....
i guess the sky is the limit regarding things to customize on such a page. I just think it would be nice to have a page that is really customizable for these kinda things since jumping around in menues to mute, change tracks or whatever is doable, but i think it could be made easier with this.