There is no connection between the time the server are offline and how well they are running.
Well think of it this way, if they do not maintain the servers they would be absolutely terrible. Crashes all the time, tons of latency and even more downtime fixing the active problems. Just like your computer, you have to clean it up every once in a while or it will eventually run slower and slower am i right? Who knows they may have found a huge problem with the servers that they just ran into while implementing this update that could make your computer explode in your face if you are in the right spot at the right time doing the companion dance. You never know... (obviously not going to happen so no need to be scared, or could it????)