Err what?
It's entirely reasonable to expect Azure to handle the loss of a single DC and not have a 14+ hour global outage. I don't care how big the DC is, losing one should not take out the world, especially not for the length of time this one has been going on.
https://perspectives.mvdirona.com/2017/04/how-many-data-cent...
With that, though, it sounds like the size of this datacenter is way out of scale compared to the rest of their DC's. They are really going to need to break apart the services that they host there to make sure that DC to DC and region to region fail over works correctly.
(I apologize if the following sounds snarky. I don't mean it that way, I just can't find better wording.)
Microsoft has repeatedly violated my sense of "reasonable" in the past, including in recent times with Windows 10. Therefore this kind of glitch isn't very shocking to me.