I agree that Overture’s implementation of mapping articulations is fast. Although if it’s of any interest… someone pointed me to this thread after I posted this feature request: https://www.steinberg.net/forums/viewtopic.php?f=246&t=139670
Overture has some mapping simplicity, though it also needs a more organized UI (Don mentioned that he knows this). He invited me to NAMM and he’s easily the most user-oriented programmer I’ve ever known. Plus it’s a serious credit to him being a one-man-band. But that said, I don’t think Steinberg should necessarily look to Overture here. While Don is user-oriented for functionality, UI and ease-of-use are another world. That’s the area that I believe your input is touching on the most.
Anyway, I’d just suggest keeping FR’s closer to the way Dorico/Cubase works. It’s the only way to make headway half the time.