Shumpert's a flawed player, but a valuable one. He shot under 40 percent in college and is predictably doing that in the pros, but he plays defense like a fiend. He harassed the heck out of Derrick Rose the other day, which isn't easy to do. Consider him Donnie Walsh's last gift to the Knicks before his administration of competence and respectability was replaced by one of opaqueness and wretchedness.
Jury's out on Barnes. He's got the skills, depends whether he can develop his defense and handle into something better than it is right now, while getting stronger at the same time. If he hones his shot, he kind of reminds me of Rashard Lewis, who was a very capable player by his second season out of high school. Of course, Lewis had more natural ability and a couple inches on Barnes. Maybe the best case scenario here is Danilo Gallinari? His defense and ability to drive were questioned as well coming into the league, and now they're strengths.
Or Barnes could wash out. Or he could have a relatively long and undistinguished career, like Danny Ferry. It's too early to tell.