Where is Raven Symone? And what's happening to Disney?

Hey people! I've been wondering...what happened to Raven Symone? My little sister watches Disney channel twenty-four seven, and she told me that 'That's so Raven' has disappeared from Disney Channel. Not to mention, in the new Cheetah Girls movie, she had been kicked out. One World was much lamer without Raven. I like Raven and am stunned to see that Disney has erased her completely. She has a wonderful voice and is a good actress, suddenly she's gone. Disney is going from good to bad. Suite life of Zac and Cody was hilarious, now it's just plain old boring, as for the Hannah Montana series, that's from bad to worse. They are also adding new seires, which are plain boring. Has Raven been kicked out to make room for them? Or was she not good enough?