I'm not going to defend Haas he was not good. But that punch he took was just that. A full force palm punch right square in the nose. Can't believe they didn't even look at it. Now as for the rest, I still want to see deeper post position from him to improve his offensive efficiency.
Haas didn't have a good game, but he's had good games against decent opponents this year. I think he's very aware of his circumstances - his freshman year he got a couple flagrant fouls called for nothing except him being normal. So I think he's still hesitant sometimes. But it's about the right positioning - when he positions himself right, he's unstoppable. He's gotten a lot better than that, but it's easier said than done.
That being said, I do not understand how that palm to the face was not reviewed. He was clearly shaken up by it and usually if there's any sort of suspicion about a blow to the head, they review it.