Muleshoe supposedly thought that Malachi Nelson was better than Arch Manning. That might have been cover for "we don't think we can get Arch Manning." Or not.
Anyway, Nelson was an OU commit until Muleshoe departed, then he decommitted and soon committed to USC.
I don't know how well Sark and staff are at developing QBs, but I don't think Muleshoe is great at it. As offensive coordinator, he put good QBs in position to do the best with what they had, but they didn't actually progress while under his tutelage at OU.
So, I think he's not special as a QB coach and not special as an HFC. I think his strongest calling is OC.
I think that about Mike Leach too, and there's the obvious connection between the two of them.