Switched to DX11 Legacy as suggested above but with gfx rating of 10/10. Game crashed from the memory leak issue just minutes in, I was only running Firefox which is about 1.5gb ram used, and Tixati (a bitorrent client) that’s only 100mb (but seeding a ton of 1080p videos)… I have 16gb physical ram and windows set 6gb cache. Task Manager says I have 7.5gb to spare without WoW running. nVidia drivers updated to latest, using a GTX 1070. This is unacceptable, Blizzard.
Edit: Because of the game crash, B-net app and Wow takes longer to load. Again, unacceptable.
Edit2: Come to think of it, the crash happened as I was flying into Vale of Eternal Blossoms at the southeast as I was coming from Jade Forest. Could be a bad character model related to 8.3. (Scan and Repair turned up with nothing)
I hope this is fixed asap because the crashes are making my computer act weird even after reboots.