Ok, so i just did this quest at 7 in the morning and her mate DID appear. So they have not removed the mate from the quest. When whe was at 23% health she called for him and he came running out and started mobbing me. No problem really except for their fears every 2 seconds....I believe the reason he didn't show up for the 70 lock and his friend was because they killed  her faster than she could call for him.
P.S. Took me about 10 kills before the sacred meat dropped and it was from a Huntress, not that it really matters and i did this at lvl 57.

Scorpkiller 57 Shadow Priest