Was having this discussion with a dear friend tonight. We both considered how KC might be the recalcitrant one, not going along with the idea a petitioning for a plea deal now (or throwing a hissy because she was led to believe earlier it wouldn't get this far).
While I'm sure it's true that JB exploited the situation earlier to catapult himself into the limelight and use the notoriety to further his career, after Caylee's remains were found nothing has exactly gone as planned. The little fit she threw that day in the jail may be her true colors coming out - she may have been promised things that could not be delivered, but it is equally possible she may have shared her mother's stubborn insistence that the world would bend to her own wishes in regards to reality and that she refused to budge from her initial story.
JB looked very uncomfortable reading that sniffy little missive KC had him read to the public about her wishes for Caylee not being honored, and the fact that she fully expected to visit her grave. She wrote that ridiculous addendum to the motion accusing the state of harboring a grudge, perhaps over his objections. It's obvious it took AL to get her serious enough about the possibilities of a DP to get her to stop acting silly and self-absorbed in court (to little avail, now she simply appears to get angry or cry self-pitying tears). KC may simply be imitating her mom - who is completely uncooperative with and hostile toward anyone who disagrees with her own version of the world. Perhaps she's been the one all along that refused to take a plea and insisted she'd be found not guilty, we really have no way of knowing, but that would certainly fit with the behavior we've seen her exhibit since her arrest.
If JB is not a total idiot, he might be waiting until either before the check fraud trial or right before the murder trial to go before the judge and recuse himself by saying he cannot represent her because she refuses to listen to his counsel. Let's face it, he's had the most useful 15 minutes of his fame, and any further association with her, particularly the keen probability of losing a high-profile case in a spectacular way, is likely to diminish whatever cachet this case has given him. If judging by the lack of exculpatory evidence and the lack of activity so far of defense experts we can surmise the defense is between a rock and a hard place, which they likely are, he would be smart to cut his losses and run. I think he can lose everything he may think he's gained by associating himself with this case past a certain point.
So he may go for a pre-emptive strike and save himself in the eleventh hour.