The big difference between your view of experimentation, and Berhalter's, is that his involves tactical experimental and the potential for improvement in the play of players and team cohesion. And yours is pretty much just roster experimentation. Berhalter isn't wildly inconsistent. He is just focusing on completely different parts of the game. And he clearly fundamentally believes that he can improve player performance within his framework. He also, like every coach, isn't as reactive to single games as a fandom is.