Again, via Mumper on Twitter:
Another note on pet battles, Taming Azeroth achievement is setup to complete with either Taming Kalimdor or Taming EK, you don't need both.
Note that the display is wrong in 5.0.5 since the change was made via hotfix. Functionally, it will work though. UI is fixed in 5.1.0.
This is great news! I hope that means they are close to fixing the dailies. I'm still not able to access the EK dailies.