So I was watching Towelliee's stream last week while he farmed the music tokens for the Garrison jukebox and I noticed that he got the mainhand glaive when he killed Illidan.
The next day, i went into BT on my rogue (I've been farming the glaives for a long time) and I got the mainhand as well. I went back to BT when I woke up today for reset and the OFFHAND dropped too!
Maybe I'm super lucky + seeing Towelliee got it was just a coincidence, but I thought I would mention it incase there has been a stealth change.