Over the Knicks' 12 games in January, the opposition's point guards have shot 39% from three-point range and 51% overall, while averaging 18.5 points, 6.8 assists and 4.5 rebounds in 36 minutes per game.
To put that into perspective, only one player in the NBA, reigning most valuable player LeBron James, averages at least 18 points, six assists and four rebounds while shooting 39% from distance and 50% overall. In other words, the Knicks have allowed MVP-level performances on a nightly basis at the point-guard position.
As hard as it is to contain LeBron James, you really don't want to start turning OTHER guys into LeBron. You'd like your LeBron to be strictly limited to just LeBron.
It will be interesting to see how much the returns of Felton and Shumpert helps the Knicks contain opposing guards. Felton's obviously not exactly a lock-down defender, but certainly has a little better quickness to contain the dribble drive than Jason Kidd at this point in his career.