It appears that all indoor ring quest NPC's have disappeared in 14.6.
The outdoor ones (Susan Furor, Elmer Raag etc) are still alive and kicking, but the indoor ones (MA, Soldier, NT personally confirmed) went away in 14.6 patch-the-patch patch. :D
fixer quest NPC's seem to be around, so it seems isolated to the profession ring NPC's.
