Didn't greatly surprise me.
Burgess was wanting to retire before Rossi went to Ducati.
Rossi persuaded Burgess to stay on since they worked well together.
After the two year Ducati ordeal, Rossi is at a cross-road where his is trying to determine if it's time to retire, or if a different approach is needed.
Next year will be the deciding time frame.
If Rossi doesn't move himself into championship points finishes (consistent 3rd or better, not 4th), then he may determine that he was the main problem, and may need to retire from MotoGP.
Sometimes you have to remove the variables to arrive at the problem.
It's done often in other sports.
However, I feel even worse for Nicky Hayden, since he was with Ducati the longest and he wasted a lot of good years chasing the impossible.
I'm hoping his move to the RCV1000R will allow him to put the bad years behind and start enjoying racing.
Nothing puts a downer on one's enthusiasm like fighting hopeless causes.