First off, thank you so much for your replies, I appreciate each and every one of them.
The doctor filling in for my regular PM doctor did say that the paddle leads would not move/migrate. He also made it sound like the surgery would be no big deal at all, hence the "you have done the hard part already". But at the same time explaining they have to remove a small piece of bone for the revision surgery to insert the paddle leads. Also, because the battery is hurting so much, he said they would relocate that as well. In my opionion this would be not be a piece of cake surgery.
I will talk with my regular pm doctor soon, and get his take on all this. My biggest fear is doing a revision and having it not work. Its discouraging to go through all this and still not have the desired pain relief.... thank you again.