To be honest, unless there is more information forthcoming its all irrelevant to me. I happen to like both Obs and Avellone - this apparent feud is pretty minor and shouldn't effect my sentiment to either, at least until something more concrete comes out. It doesn't say much about Fergus and his approach to management though. Clearly there was an issue which could have been sorted out.
It is not an easy situation for Feargus if two of his partners can't get along with each other. At that point it isn't management issue, it's more of personal issue with Avellone and the Parkers. Keep in mind these are people Feargus probably consider as his close friends.
No matter what he does in a situation like these, he is going to piss off one of his partners/friends