I'm still undecided on this, an ideal solution would be both! A Voice/channel mode that detailed settings are made for a single channel and a Performance/Multi mode where a set of parameters can be adjusted across multipul channels.
An example of Performance mode would be the 4x4 encoders assigned to ENV2, you could control the ADSR of 4 channels without any paging.
Right, so now we have three concepts of paging:
8/4/2 Voice mode (TK.'s choice) which is like a traditional MIDI-CV
e.g. 4 voice with pitch CV, filter CV, gate and trigger; encoders are arranged in blocks within a voice and menus are used for finer tweaking.
Single parameter mode (my choice) where all modulator depths across a single channel are accessible on one page, and specific parameters of modulators are on others. Each modulator is thus tweaked on a channel basis; see the mockup picture:
e.g. Channel 1 is selected from the 4*4 button grid
the encoders are colour-coded to match modulators represented on the bottom half of the button grid and adjust depth only on Channel 1.
Env. 1 is pressed, the encoder field changes to yellow and all stages/other parameters can be tweaked. Unused encoders are unlit.
For transpose and tuning, there's the "keyboard" layout of buttons and a dedicated encoder
Multi parameter mode (your idea, kind of a hybrid between those above) assigns encoders to specific controls across multiple channels,
e.g. ADSR of Channels 1-4. You'd have to make some judicial decisions when more than four useful parameters were needed.
We'll have to test the hardware to get a good idea of the most useful workflows, but hopefully it's flexible enough to accommodate everyone's needs.