Well the game has kept me up all night so probably a good thing they brought it down. I seriously doubt that this is going to be "normal" downtime considering it is a weekend and I have never known any game to have patch day on the weekend. They are probably just bringing it down to address some of the issues people have had during the first day. Luckily I haven't really seen any major issues. At least it is planned downtime instead of a server crash or some other failure.