What sort of things would you like to see?
Most of all: global blocks. Not necessarily in any specific incarnation, could be as in Fractal land, as the Boss method or maybe even as a hardware-dized Mainstage (which isn't exactly using global blocks but you're usually loading full "registrations" per gig allowing you to manipulate whatever portions within that registration, so a drive block you'd change within the project would be changed throughout).
Then, several UI improvements.
As a very general thing, offering a rather different approach towards things, I'd like to be able to rebuild a loopswitcher based pedalboard inside a modeler. The main thing I like about that is that I can preselect things per loop and only recall the on/off status of the loops. Ideally, this should go along with the current "traditional" approach, so you could have both completely different parts of your board per patch/scene but also keep another portion sort of as a "playground".
To make all of this work flawlessly, a different set of hardware controls would be required, such as:
- More switches, ideally ones with scribble strips. In an ideal world, they'd be stackable, so the base version could come with whatever smaller number, allowing you to stack up banks of, say, 6 or 8 additional switches.
- More encoders, ideally again with scribble strips. In an ideal world, you could a) detach them from the unit and b) stack them, should you want more.
To keep everything under control, it needed mobile editors. I don't know of any musician without a tablet anymore already, but €100-200 would already buy you a nice one capable of running any editor, should you want to dedicate it just to your modeler.
That very editor should allow for different modes, such as editing mode and performance mode. Editing mode would be rather typical but it should allow you to edit multiple blocks simultaneously as many of then strongly interact (such as drives and amps or delays and reverbs) and it's a real chore having to go back and forth all the time. Performance mode would allow you to place the most relevant parameters for, well, a performance next to each other on one page. Think along the lines of TouchOSC.
Those would be my major wishes.
Note: Apart from the tablet thing, I have been able to slap something pretty close together around 15 years ago already, (ab)using Energy XT (a killer modular host, unfortunately discontinued in the form it had back then) and Guitar Rig (I think V3). I was using Rig Kontrol, an additional Rolls MIDI switcher and a Behringer BCR 2000. Initial setup was a nightmare but once it worked, it was pretty damn impressive and stable. Could only use it for some theatre jobs as the system was too much stuff (I added a rack preamp and speaker sim for rock sounds, too) and I'd never knewn where to place the laptop on normal stages.
I'm saying this because that's the reason why I know it could be done quite easily.
Regarding sonic things, I'd like to see more playground-ish stuff. Yeah, I know, most people want iconic amps and stuff, but personally, I'd rather like to have some experimental and oddball things. Envelopes, LFOs, input level as modifiers, decent sets of filters and maybe a synth section a la Boss SY-300/1000.
Oh well, in my wet dreams, someone would ask Urs Heckmann of U-He to port his MFM2 delay to a hardware modeler. Most stunning delay ever.