Gleeful Issues

So the show returned last night, ratings were down and I think I can finally put a finger on where my issues lie with the show.
I think it's awesome that Ryan Murphy found a way to take something really as uncool as glee clubs into a network hit, but the show has two problems. One is the David Kelley Rule, where shows that are so idiosyncratic eventually succumb to those idiosyncrasies. For example, Ally McBeal...by the third season (which is typically where these shows fall off) we knew every episode what we were going to get, Ally's seeing a baby dancing, Peter McNichols nose would whistle... Picket Fences fell the same way... and Glee too could be headed in that direction.
The other problem is I find that the characters I'm really drawn to are Jane Lynch's Sue and the head coach of the football team. They're the character with the most depth, they are the most interesting and they actually seem to grow. This year Sue is running for congress. Dude. That's awesome. She's crazy and I'd vote for her just for that reason. Her platform has banning the arts in school. Who can't support something like that?
The rest of glee.... well, it's the same. Will Shuester is angry because Sue is trying to shut them down and the kids are trying to recruit new members so they can compete for sectionals. If I recall correctly that's what happened in season one.... oh, and season two.... they need to switch it up big time, but I just don't know where they go. The freshness is out and now aside from Sue we're watching a simple CW High School drama. Am I wrong? That's possible I suppose. But please, tell me why.