To be honest, I'd say there's some reason why Sugrue left outside of family and business committments. I don't know that for sure, but I'm very surprised he's left at this time. He was building something up and was just getting started (it seemed), having built a good foundation. He doesn't strike me as a man who just gives that up unless something very negative happened. I certainly don't know this for sure but I'd guess there's some other reason there. Maybe we won't find that out eitherway.
It's hard to look at other possible managers at this time.