Fwiw, not that anyone would likely be interested, but in case any such a pedal was built to suit my needs, here's some ideas of what it'd be like in various incarnations of complexity.
The most basic pedal would be sized as an Amplifirebox (or similar).
Would load exactly one amp at a time, no FX but a gate and that was it.
There'd be a pretty small display and 5 endless encoders on it, plus one hardwired output volume pot. The endless encoders would have LED rings (or something similar).
Controls would be gain, BMT and master, by default the tone stack would be post-modeling but one should be able to define placement, frequencies and Q via software.
One single switch would likely be sufficient on such a unit (on/off or cycle, depending on your use case).
Should feature an IR loader (in case direct captures would be your thing, which they would be for me). All encoders could have an ALT function so you could access patches, IRs, noise gate threshold and maybe a simple global EQ.
Could optionally feature a cab-free second output.
Would buy this in a heartbeat (in case the price was right), would allow me to take any amp ever made with me in a pocket or on my pedalboard.
Next incarnation would allow for 2 captures being loaded simultaneously (and serially, at least for a start), following the idea that tons and tons of great guitar tones are a combination of whatever pedals with whatever amps.
That device would have to have 2x5 endless encoders, as WYSIWYG is your friend. Should also have two switches, both of which should be configurable in various ways. Might be a good idea to have a remote control jack or even MIDI on this, too.
I would buy this even more than the smaller one, for me that'd be the perfect baseline model when recording or using my pedalboard.
Could be used largely without any menu diving and once you'd have your models and switch layouts sorted, you'd likely never needed to connect it to a computer again, either. Size could still be considerably smaller than the design that was leaked.
Especially in case the latter would be the baseline model, one could build up on it.
For a gig-ready standalone unit, an addtional EQ (for, say, post-boosting) and a simple delay/verb department would likely be sufficient already. Could even work within the same form factor boundaries.
Or you could go big and add all the usual suspects.
Oh, and I'd generally like to be able to load either captures or models.
Thing is, in case the leaked unit was for real, there's plenty of things making absolutely no sense - or at least leaving plenty of things left to be desired. It's not particularly small, not exactly gig-ready for most people (at least not on its own), non-endless encoders are horrible, etc. Pretty much every imaginable user would end up with a compromise of some sorts.