u can wake up before maintenance starts and either stop or rebuff buildings ) Anyway patch is usually a lot quicker than maintenance or maintenance+patch and patching only happens when they can't do hot patching and mostly they will try to minimize patches and push a fair chunk of changes- No game can avoid emergency or urgent patches
From BB's point of view they will optimize the process and try to minimize the cost. Which from the playerbase point of view should not be a bad thing- the longer the game runs in the black, the longer the game will keep on running