Rowett has zero experience of managing in the Premier and Premier players. He only gained a reputation by working on a small budget in a middling Championship side.
What on earth ,makes you think he will sort us out. I expect he is a decent bloke, but not what we need. Sam will turn it round, but it wont be the instantaneous change people demand. He has to address fitness, players confidence, playing style and new additions to the squad, plus who to ship out. 10 games if no change, then be concerned.