Earlier quoted context omitted.
> OSS needs more UI/UX people, and I think Tantacrul is fantastic for this. True, Blender really exploded when they re-designed the interface. I hope someday GIMP team understand that. The software is solid, but the interface isn't great. Some very simple workflow changes made Blender easier to use.
Where do you get UI/UX people in from?
The issue is that many designers and engineers loathe Usability and Accessibility people (like Jakob Nielsen and Don Norman).
For me, it all started with Don Norman's excellent book The Design of Everyday Things[0] (nee The Psychology of Everyday Things).
Reading that book changed the way that I view the world. I can't walk through a door, anymore, without evaluating its affordances and usability.
The challenge (for me) is melding usability and aesthetics. In my experience, designing and implementing a truly usable software interface is hard. It's also highly iterative. A lot of "running things up the flagpole" stuff. I throw out a lot of code, and slaughter a lot of sacred cows.
[0] https://en.wikipedia.org/wiki/The_Design_of_Everyday_Things