#1 - Oct. 14, 2016, 7:19 p.m.
7.1 contains mainly the Return to Karazhan Mythic+ Dungeon and the Trial of Valor raid. Nighthold is not part of this patch.
You mean Mythic( ) not + right.
This is false, and based on misinterpreted datamining. The ilvl 850 follower mission associated with Karazhan is an "Investigate" mission, which gives you a quest for some bonus loot, exactly like the existing missions that send you into dungeons or into Emerald Nightmare.
The attunement questline for Karazhan primarily involves Mythic dungeon content.