Good news! Horde reps are now appearing on my Horde Earthen!
I even did the two Orgrimmar dailies and they’re giving me rep for Orgrimmar, along with the other two missing Horde reps and that generic “Horde rep” message:
I would like to ask for those who race changed into Horde Earthen to check your rep again and report back on whether it transferred your rep correctly or if it reset them back to Neutral or whatever the default would be. It is important to know if that got fixed or not.
Also, I’m still having some problems with disappearing reps similar to how the Dark Talons rep was working. Guardians of Hyjal is doing the same thing, as it adds to my Rep pane when I talk to this NPC:
But as soon as I log out, it disappears from my Rep pane. Talking to the NPC adds it again, but it’ll always disappear as soon as I log off. I haven’t tried to gain rep with them to see if it stays or if it resets. To be honest, given that it disappears, I’m scared of working on rep, potentially losing it, and having lost ways of gaining that rep with whatever work I did before.
So I’m happy to finally have the Horde reps potentially fixed, but it seems like other reps may be bugged as well. Hopefully it will continue to get looked into.
And again, a thank you for any Blizzard employees who looked into and worked on fixing this. It is very much appreciated! Thank you! 
