It has been on the air less than two seasons. How is that too long? We aren't talking a show that has run itself into the ground and has tapped into all it potential and is just grasping like TXF. Quite the opposite--I'd argue that its greatest failing is the fact that it hasn't tapped into its full potential yet choosing instead to rely on well worn formulaic drivel.
You realize you're trying to talk reason with someone who deliberately spoiled nuBSG to a poster here who hadn't seen it yet and was simply inquiring about it. That should tell you all you need to know.