The first round of bug fixes and clarifications is up for Patch 7.1. Of Particular note:

• Mythic Keystone dungeons now count towards the Legion Dungeon Event and Karazhan Attunement Quests.
• Several specs have reduced stats for their PvP template, including Fire Mages, Frost Mage,s and Rogues.
• The Sword of Light passive is now properly calculated into baseline damage for Retribution Paladins.
• Sheathing weapons no longer causes the game to crash.