I think this is spot on about Casey not admitting her guilt and her lawyers are doing the best they can (which isn't much)with whats left.
In her mind she is not guilty, as if she wasn't seen committing the crime, no one can say for 100% sure that she did, therefore it wasn't her. Aided and abetted by her parents no doubt, who through all the evidence contrary, support her not guilty position.
This is where I feel Casey gives herself away, she is utterly contemptuous of her parents, especially her mother, for their continued support in the face of her obvious guilt, Cindy going so far as to claim Caylee is still alive.
I think Casey also feels very noble and the role she is playing is one of the martyr, unfairly judged by the ugly masses and found guilty by reason of jealously and malicious intent (and bloggers haha)... She will be found guilty and strut to her cell as though she has done something honorable...
I believe her lawyers can't control her any more than her parents could and there is nothing left except the penalty phase and mitigating circumstances. When you have a client that not only lies to everyone but lies to herself the best bet would have been to plead out, an alternative no longer on the table..
I think JB certainly bit off more than he could chew and as his options diminish I bet he feels he would have been better off never having heard of Casey Anthony.