Guys, I got it; Advantage tokens!
Hear me out ... I love narrative dice, but rolling advantages often feels like a drag on the fun. When I get the book (today, tomorrow? ?) this is my plan to fix the system ?
I'll give my players advantage tokens when they roll advantages. They can keep them in a shared pool and spend them whenever.
(I'll also add black dice to most rolls just to make sure "remove black dice" effects don't go unused.)
Problem solved. Such win.