Again HS stats are meaningless but what he's doing is just freakin ridiculous. Murph is one of if not the most polished HS arms in the country. He's a Zack Greinke starter kit.
He has a history of slow starts. It seems to take him a little while to find the feel of his sinker/slider. His track record says keep pitching him and the results will be there.
I don't think he's going to be a White Sock. They don't like pitchers with bad arm actions and by the time they think he'd be worth the risk he'll be long gone.
He's a pie thrower. Pie throwers usually have below avg breaking balls (check) and poor command (check). Now granted most pie throwers don't throw 100+ but he's going to need more than that to succeed in the big leagues and his arm action will be working against him. I'm sure someone will take him somewhere around 3-5 and try to fix him but it's not going to be easy.
He's only pitched once this spring because of mono though some think he's being managed by Boras. He's supposed to get back on the mound in the next couple weeks. If he's as good as he was in his previous outing Boras will probably shut him down again and ride that to a top 10 pick.