In his earlier 20's Korpedo used to be a decent 3rd line option, sometimes showing flashes of even more upside. At times he showed a great power move or even a skill play, while always having good work ethic. But he never had the finish, he just shoots it at the net without aiming anywhere else than in the goalies chest. He doesn't have a great hockey sense or vision, making him somewhat of a black hole offensively and not that great defensively either IMO (when it comes to reading plays).
He works hard and is a decent PKer, but offensively he's lost the drive he once showed he had. I guess scoring a goal on 1/10 good chances starts getting to you.
And it's not like Korpedo is a hitting machine either. He battles along the boards and skates hard, but nowdays he's just a very boring player.
Definition of a guy who you can throw out there in case of injuries and know he can compete, but ultimately doesn't really bring anything. In my opinion these kind of players aren't really NHLers. He's sticking around just because he's a veteran player.