John R. Copeland wrote:

Regarding the "straight line from FAF to VDP passing under a stepdown",
that's handled by a charting a delay before descending until reaching a
point from which the stabilized descent will meet obstruction-clearance
criteria. The CNX80/GNS480 follows that charting.
It does not start the descent from the FAF when it's incorrect to do so.

That's a nice solution; I wish I could see it for myself grin.

- Andrew