"didn't change his facial expression the entire episode", "far less dynamic"... How long ago did you guys watch the episode? Maybe you're basing it on the snippets of Cage scenes in the Menagerie. You've got to watch the whole Cage episode in its entirety. Yes, Pike is portrayed as a very serious captain who rarely smiles. But he does show a range of emotion. And... just look at Kirk in early S1 episodes compared to later on. Huge difference. Hunter didn't have a chance to develop his role.