If you could ask just one, what would it be?
I'd go for 'Steve, this is the third time you've introduced a new manager to us in less than a year. What makes you think this one will last any longer than the previous two?'
I'd go for 'Steve, this is the third time you've introduced a new manager to us in less than a year. What makes you think this one will last any longer than the previous two?'