Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
They all come down at the same time,
Not true, I think. I installed most of the June Windows Updates on Wednesday evening 11 June. I'm not sure how long they'd been waiting for me to give the go-ahead, but probably a few hours.
Office 2013 did not update itself until 24 hours later, in the evening of 12 June. I've had no problems (touch wood) so far with the updated MSO 15.0.4623.1003 32-bit on W7 SP1 Pro x64.