I think you're all dancing around the word that defines Lucas now -

Control.

It's at the point where everything is about him getting his way, period. That's why the OOT got shafted on DVD, that's why the PT turned out the way it did, that's why he's putting the TV show on hold. He's letting Clone Wars run as it is because it's a cartoon so he doesn't hold it to as high a technical or narrative standard as live action. (Not that I think CW sucks, but I can see moments here and there where a story had to be simplified for time or compromised for censorship safety.)

I'm sure profit margins figure into part of this, but probably not as much as zombie84 suspects. More likely there's some legal fine print between Lucas, Fox and the networks that's giving them some measure of control over the show that Lucas won't agree to. They don't want to play his game so he's gonna take his ball and go home.