The upshot of that whole piece is that when making things terser we have to be careful not to make them impenetrable. Not sure that is much of a scoop. I worry about that every time I name a variable or function. It might be an answer to those complaining that Arc is just a bunch of macros atop Lisp: part of the hard part for PG may have been maintaining that very balance between brevity and obscurity. And I hear E=mc^2 was considered obvious by some once Einstein wrote it down. But I digress.
