Hi, there!
Sorry to hear that your morning games were disrupted due to the micro-patch. I know how much people value a game or two here and there between responsibilities .
We let folks know when server downtime will be happening ahead-of-time, but we don't make announcements about when updates and downloads will be required exactly. The reason for this is that, generally, the downtime lasts up to a few hours while a patch overall doesn't require as much time. To avoid spamming people with messages about downloads and downtime that eventually we'll all start to ignore, we choose to only inform about actual server down-time. I'm aware that some folks have slower-than-others internet connection and that it may mean patches are longer DL's for them, but we sort of assume that if they can play WoWs their internet is good enough to mean that a patch doesn't take as long as actual downtime.
Hope that helps!