When programming, shit goes wrong. Takes ages to debug, they're maintaining a huge game.
Even being able to patch w/ new features is an achievement, honestly. Think about it.
If you were a programmer and something went wrong. Wouldn't you need another hour or so to fix it? We're humans. We're not perfect. We aren't even close..
Next time, think about it. If you were running a game, wouldn't you want to be As bug free as possible before you release? I'm sure theyre trying their best.