I like the idea of "focus on smoothing out discontinuities in Emacs' investment-reward curve." I think there be taters there.
What makes GNU Emacs unique? After all, there's ITS Emacs, Gosling Emacs, XEmacs, and DrRacket (at least).
Here's how I think Emacs, if not GNU Emacs, is unique:
Emacs is an editor with a heart and a soul. Its beats to a rhythm of compile, eval, garbage collect, transforming code into action. It performs the raw mechanical functions an application needs to do. But it also has an intangible quality aficionados recognize. Like a soul, it's difficult to explain and you probably feel silly trying to. I think being able to explain that to people would be a tremendous advantage.