This guy unfortunately made a separate thread:
but presents the exact same issue I had. The Wowhead guide seems misleading. I ran three or four horrifics so far and I only got a piece of armor the first time. After that, while I did get essences for my other specs, except the last run, I never got another piece of gear after that.
Now I’m wondering whether a new piece of gear only drops on a new day or even week and whether I wasted my runs to a degree. (Although practically it’s not a big deal since my slots are higher ilvl already. But if/when that rises, it would be useful to know whether I speed-upgraded my cloak to great detriment.)