Another one bites the dust......
I think that this is a mix of:
1. A clash of personality/style between AL and Cheney
2. AL not being well received in the Florida courts
3. AL realization she is on a path towards a Lose-Lose
4. $$$$$$, the indigent fees do not cover her high priced costs
I have to agree with all of your above, plus, I would bet that DePaul University is sitting with a mighty p-o'ed look on their paperwork for the money that was drained from their accounts for Casey, who isn't even a resident of Illinois. {realizing that this fund was also for other/many out of state people also}
But, Miss Casey certainly cleaned out that account, much as she has been known to in the past ~
Also, perhaps as things progress, maybe Andrea Lyon was more concerned about "other money info" coming out, that has yet to be accounted for that many have questioned.
Her "clean record" certainly plays into this also, IMO.
This entire family have been unco-operative from the get-go.
You can only beat the drum for so long before the echo rings bad in your ears if the players aren't following the sheet music.
So, along with Andrea Lyon, byebye Mort and and Jeanette.
I believe when the dust settles, that Judge Perry will order them to procede on schedule.
There should be plenty of notes and recordings for someone else to pick up and catch up.