I think I would be more welcoming of his departure if they actually gave us the reason. It's often a "sell first, ask questions later" reaction if a CEO or CFO departs abruptly and without a stated reason. I think the BOD should all be removed for not providing us with a little bit of clarity and stability.
They never do and I don't think it's fair to shareholders. You've got a mid 50 year old guy, who basically got canned for some reason, although they mention he was staying on for the upcoming meeting. The fact that they need an interim CEO, and had nobody groomed for the position is going to raise questions.