Looking like Heroism emblems are still dropping from bosses in random dungeon finder. Last season when this patch (Uld) went live, they switched to Valor and Conquest for daily reward.
You're wrong. That's not how it works. Please have someone knowledgeable answer for you about this Mr. Moderator. https://i.imgur.com/JnM3MAa.png
These are 3.2 patch notes. We can't find any emblem changes at 3.1
Either way, if you can demonstrate that the emblem changes have indeed gone through in 3.1, you should open a proper report at the bug tracker. The forums isn't the place for bug reporting, and as such, I'll be closing the thread.