I was lead to believe you received the exotic Mark for reaching Lvl 60 with Dead Orbit (hard graft is an understatement) but I did reach Lvl 60 and got nothing momentous at all. So I take it the factions ranking just keeps going on and on and on.... Lost motivation if there is no just reward for the effort put in.
-
Quality level is different to faction rank. And also those exotic class armours are not in game yet. The stuff on destinydb are all datamined.