Thanks for playing. With regards to the 6th glyph, see below
Puzzle spoilers
The intention was for each solved letter to be how it would be displayed on a 7-segment display. If the 8th character was shaped like a ‘q’ it would create a solved letter that wouldn’t be possible on a 7-segment display.
However, a ‘q’ shaped character would give a better looking solved character and maybe the 7-segment display requirement is unnecessary. Something for me to think about. Thanks!