I know the Scrivenings mode is getting updated. One thing I haven’t seen mentioned is that, on touch-oriented devices, a regular document scrolls intuitively (finger-scrolling works). But in Scrivenings mode, finger-dragging selects text instead.
FWIW it’s also counterintuitive to me that PgUp and PgDn in Scrivenings mode go all the way to the top and bottom of the document. I don’t want to go from document to document though, I just want to page up and down.
And one last scrolling request, though it’s not Scrivenings-specific: If holding Ctrl+Up/Down scrolled a line at a time, without moving the cursor (unless needed to keep it in the display) that would be really nice. A number of other applications do this (for instance Notepad++ and Visual Studio).