This may be a sign of that. We have long suspected that one of the points of contention with AL was that she wanted KC to consider a plea (remember AL defends against the Death Penalty. Any outcome that does not result in a DP verdict is a win in her book. MOST of her clients that she "successfully" defended will never see the outside of a prison. (or possibly all of them, I don't think she has any actual acquittal's) )
Now if we apply this to LKB I can't help but wonder. If there is the slightest nugget of truth in the travel expenses and costs reason for leaving (which I don't buy for a minute), the ultimate reason is that she would not recoup any such costs on the back end. Doing books, lectures, TV expert, heightened business from the publicity, etc. Win of Lose, she needs an actual public trial for that. A plea deal is just expense on her part that quietly goes away with no fame, no book marketing and no lecture tour. If they are seriously considering a plea deal it might be a strong reason for her to get out now. In a plea deal her area of expertise is not needed or used, she gains no fame or publicity, and never gets back any money she lays out. Simply cut her losses early and move on.
Although one other thing to watch out for. Keep an eye on the defense witness list. If LKB is no longer on the defense that does open the door back up for her husband to be used as an expert witness. Remember he will not give testimony in a case his wife is representing.