@Nottes I think I experienced the same thing yesterday on my fresh 70 character on Area-52. A guildie told me there was arena frenzy active, so I tried queueing, no pop for 20 minutes, and no "MMR expanded" messages either. I just thought there was no one in solo queue, only premades, so I logged off.
@DeimosVoid Hello there! We can do this once we confirm you to be the original account owner. If you wish to start the process, please open a ticket via #ticket-bot on our discord.