Wouldn't say he's performing miracles, but he's far from the main problem.
His standing in world football and his attendance at these prestigious UEFA managerial conventions says a lot, he'd have hundreds of better options if he wanted to, although his tactics, transfers and discarding of good players is very questionable. But at least he has the club's best interests at heart, which gets him a pass when he makes these frustrating decisions. It's the polar opposite of Pardew.