Wieters is average defensively as a catcher. The Nats got him for his bat at the catching position though in my eyes since the market is so small for good hitting catchers. He's also not that bad of a framer iirc. He'll be a 15-20 HR guy for the Nats and that's what they needed. Adam Eaton is average defensively as well. Same situation for him though is that he's on the team because of his bat. Front office philosophy for the Nats is probably "we have a great rotation, won't need the defense as much as other teams so lets get bats at value prices."

just my 2 cents