I'm in the Hassenhutl camp. I know stats don't paint a pretty picture, but he always plays proactive football with a Soton side that has no business being in the PL, yet every time we played them(bar that 9-0 win) he went toe to toe with our side and we needed some injury time goals to just to take points of them. One of his biggest hiccups was his defensive naivite. He seems to address that this season. His side is a lot more defensively pragmatic as seen in the games they played against us and City. The man is very similar to Potter in a lot of ways.
But I'm a bit of a realist. He needs to manage a team with bigger resources like Spurs, Everton, Leicester or even Arsenal before he'd be considered a serious candidate here. As of right now he's a really big gamble, but the potential is there. Hell the man went full on Sir Alex when he roasted our dressing room for celebrating an injury time winner against his team and said: "They were celebrating so hard you'd think they'd won a trophy". This to me is a clear indicator that his mentality is top notch and he could handle the transition to a bigger club.