Breach of contract is breach of contract, and ABC should be held accountable for that. The rest of the charges are far too murky to prove. They'll settle out of court, that's my bet.
Who says it was breach of contract? We have no idea what the contract stated. For all we know, she simply signed a release form, releasing the show of liability if something went wrong during any surgery.
I highly doubt the show signed something saying, "We'll do this no matter what, and we cannot change our minds."
I am a cynic, and I think this family is just looking for an opportunity to sue. That is where most lawsuits come from.