Also — quite impressive to make major infrastructure and architecture changes in a few months. Not every organization can pull that off.
And have it work first time round.
Here is a free hint: By talking so much about where their data centers are located, on my view, they already failed item one on my check list. Principle number one of Physical Security is, you don't say where your Data Centers are, except of course to very restricted number of "need to know group".
As predictions have no value, unless they are made prior to events, I predict the next outage will be some common core component, with some on/off type of config, with some common core configuration, that "could not be foreseen". Then to the next blog...On to the next outage....