When John Smoltz and Chipper Jones are saying a guy reminds them a lot of Greg Maddux you pretty much have to listen to them. Here's what John Smoltz said about Medlen:
"He's the closest thing I've seen to Greg Maddux, with a few more miles per hour on his fastball," Smoltz said. "If you look at a young Greg Maddux and what he was able to do with that 91 or 92-mph comebacker, it was pretty impressive. I'd say Medlen has a better curveball and Greg had a better changeup, but they're close."
I wouldn't expect a repeat of last season, but yeah, I think it's a pretty good idea to extend him for a year.