Osmose UI (panel) ? or Eagan Matrix?
Osmose is pretty good,
generally, there are a few ‘UI refresh’ bugs… nothing major.
the Ext Midi/global settings needs some love from the developers, but its functional.
(it will catch many out though)
but theres nothing that can’t be resolved in later firmware.
Eagan Matrix,
Its absolutely fine, easy to use, and works really well.sure its quirky and a bit complex to start with
but thats more by workflow/approach than anything really else - its what it needs to be.
frankly, It’s been like this for years, Haken are not going to change it massively to make it more user friendly - nor should they, is not designed for this usage.
now before the masses grab their pitchforks…
“It should be accessible to all, Elitist attitude…, we need to be able to create our own sounds”
Id say YES and NO… 
sometimes complex problems , need complex interfaces… dumbing down to the lowest common denominator is not an acceptable solution. the Eagan Matrix is mature and loved.
… and frankly, really the Eagan Matrix is not that bad, you just need to invest time with it, like any complex software.
however I agree, potentially locking out a large part of the user base, who don’t want to invest the time, is problematic for something trying to be mass market friendly.
note: one could argue expressive-e response to this is use osmose as an mpe controller, and use other mpe synths (hardware or software)
Ive a feeling this might be solved in two ways, without having to expose the Eagan Matrix to users.
a) Sound Packs
I could see the Osmose Updater being extended to allow for new presets ‘banks’ to be uploaded.
this I think could be huge… and follows a little with what Expressive E has done in the past.
b) Simplified editor (native?)
The DSP is not (very likely) to change, theres too much investment in the current technology, and it is loved ! ( * )
however, I could imagine creating an editor that was more like a ‘traditional synth UI’ that creates an Eagan Matrix in the background.
for sure, it would not be as flexible as the Eagan Matrix editor BUT it would be much more approachable.
the great thing about this approach is, you could take a preset created in the ‘simple editor’, and then import it directly into the Eagan Matrix editor… so could add things that are beyond this simple editor.
I do think this is a very real possibility, as Expressive E are no strangers to writing VSTs/Applications, so they certainly have the skills in house.
of course, this is pure speculation …
and I suspect heavily depends on feedback from users, the desire for more presets, programming outside the matrix etc…
one thing that might be ‘problematic’ is commercial realities…
creating this editor is no small dev effort = cost… and frankly, users are going to be ‘miffed’ if they are asked to pay for it as an extra - so its going to cost expressive-e both development time, and lost revenue - so they are really going to have think this will help Osmose sales significantly.
( * ) this means any new editor, could not functionally do more than the Eagan Matrix can, it can merely present it in a different way,.