Originally Posted by rainbows
having to log on to use the practice field exposes you to more aspects of the game, such as guild chat, shots, the yellow popup messages, big gold star events, etc, to draw u into more aspects of the game
Except who cares about those things when you want to focus on your combos.
Offline servers are meant to keep your game at its best or to practice improving your game, even when you can't connect.
That's why you hear a lot of people getting mad when they can't play Starcraft II offline, because their game slips and they get worse the longer they are unable to play or practice.