The dialog seemed inauthentic, despite Gleeson, Isaacs, and Amy Ryan's best efforts . The action was average at best, with little of the dynamic qualities you see in the Bourne films. And the plot was a bit of a shortcut, using single characters to embody the missteps and forgeries (allegedly) made in reality by entire groups of people.
This isn't to say the film is bad. It's well above the 50th percentile, but well below what I'd expect from this crew. My opinion of it does suffer greatly from knowing what they're capable of, and comparing that ideal to this product. Only a must-see if you are itching to have a political opinion stoked or are a Damon completionist, but certainly reasoanble to watch if you're bored on a Saturday afternoon.