I can't remember who mentioned it but someone said that the starting lineup of Kyrie, Brown, Hayward, Tatum and Horford has pretty much not seen the floor together at all this season after the starting lineup was changed. The fact that Stevens wouldn't even go back to that group at the end of a game is baffling and enough to fire him IMO. Those are your best players and the lineup with the most potential and you don't go back to it AT ALL? Fire him.