Replace all missing glyphs
Option in the find replace dialogue to replace all missing glyphs, not just swapping one glyph for another. As far as I know, you have to go one by one throughout a document. The find/replace Opentype feature (text tab hasn't worked for me either.)
Have you tried the "Find Font" dialog to replace all the glyphs of a particular font with another. This should ideally ease the process of replacing missing Fonts/Glyphs. Or am I missing something here!
SUBSTITUED GLYPHS as well!