William H. Burton Sr. is okay but not always strong

I watched The Assassination of Jesse James by the Coward Robert Ford (2007) and William H. Burton Sr. was one of the parts I kept noticing. The performance is okay for the movie, but sometimes it feels a little flat. I wanted more detail, but it still has some useful emotion. There are good moments, especially when the scene is quiet. I can understand what the actor wants to do, but not every scene is strong. Some parts are good, but other parts feel normal and not very fresh. Maybe other people will like it more, but this is my feeling.