Sad he's gone, but respect that its in order to further his career. & also as other have mentioned there is no way he could know what place a new manager would have for him in the set up, if any, so partly he goes to ensure he has a job. Always welcome back in my opinion.
Not surprised at the others as they are a coaching team, and Roberts is well thought of so why not bring him with you. Bruno going does surprise me though, or at least the speed of it. He is so early in his coaching career. We as a club were essentially providing an environment for him to learn...