Glyphs in general are a huge failure and need a rework. There are way too many variables including the fact that farming them is rather limited (especially when you get to higher level crypts that require 4+ keys per run) on top of the runs themselves lasting 7-8 min MANUALLY (unable to finish on auto because of absurdly broken champs being included on the 3rd wave that need specific skills not to be on Cooldown to beat),
I understand it's endgame stuff that you are supposed to grind for a long time, but the progress is so ridiculously slow and frustrating for small immediate benefit most people just give up and don't bother. I mean I don't see anyone ever talking about Faction Wars, not my clan, not on reddit and not on youtube either so ...