Is it just my imagination, or does Cath come up disproportionately more than any other dungeon does in Keystones? It drives me nuts because to me, Cathedral is far, far more difficult than any other mythic+ dungeon. I would rather do any of them and all of them than Cathedral, and yet every damn week I get it when my keystone approaches +15. I hate Cathedral so fucking much, and it's like Blizzard's RNG is hell-bent on cramming it down my throat at every opportunity.
I wish they had kept the system in place where you could opt out of certain dungeons so they didn't come up in Keystones.