You're paranoid. At least she's not flip-flopping, stuttering, or stealing speeches from someone else. It's common practice to continue to use key phrases on the campaign trail. It's called reinforcement. She's added new comments along the way, and interspersed them with some from her acceptance speech. She's doing just fine.
And doesn't sound like a Harvard-educated jive-talking street corner gigolo. The only variation Obama has in his standard speech is usually some jab he tries to take at the other side, most of which backfire right in his face.