It's just TV. He's directing the pilot, he might direct two or three more episodes, but it's really unlikely he's going to be directing every single episode. Far as I know, there's not a TV show on television that has a single director.

For the pilot, I think he could be a very good choice, given that it's low on drama and high on squeezing in as much character interaction and detail as possible.

The Station Agent is a lovely, quiet little film, BTW. Haven't seen the other. But I did see he received an Independent Spirit Award for direction for The Visitor, so maybe there's some good qualities there.