Interesting.  Known facts; pending divorce, earns $60 to $350K less, was not everyone's favorite (except Walker), former business partner appointed by his buddy, apparently not in lockstep with the 'inner circle', suddenly quits.

There is way too little public info to judge but speculation includes; financial issues and family, definite possibility with such a loss of income.  A big skeleton in a closet?  Or an 'inner circle' falling out of a major sort.  Where he disagreed with his majesty and his court jesters.  There is always the possibility that he personally, fundamentally disagrees with the course of action that he was ordered to chart by his boss.

Time will tell but remember, many private 'consultants' earn 10 times their former salary working on projects for their former employer.  Just a thought.