Like i said earlier ... I thought the beef was because Mega, who was an unknown globally, was stubborn and didnt wanna follow Nas' advice and he signs to Def Jam ... I didnt know Stoute wanted him removed.
As far as why he replaced Mega that I do not know. he could of just left it him, AZ and Fox.... similiar to the commision with Big, Jay, and Charlie Baltimore.
Steve Stoute said himself that Mega wasn't a good fit because he was envious of Nas and felt that he was "owed" something. Stoute purposefully removed Mega from the Firm.