There's a lot of harsh words for Rondo in this thread.
He's 23, averaged 17 10 10 for the playoffs and has an entire summer to step his game up even further.
You guys are being way to harsh on him. Its tough to improve a weak area of your game, and he improved this past season from the year before, so there's no reason to think he won't improve his J more this summer.
Its easy to tell someone to work out like a maniac. Its a lot harder to do it yourself, so ease up.