Which of his front court mates are a worse compliment than Derrick Williams defensively?
I'd say Gallinari (PF) is about equal to what I'd expect D.Williams to be as a rookie PF.
Also, we're just assuming, automatically, that a guy who everyone agree ought to be an adequate defender at the 4, is going to be a complete sieve when playing the power forward.
Also, the Knicks' most efficient 5 man unit for the entire year was one that featured Gallinari at the 4, a guy who is likely to be worse both as a defender and rebounder than Williams.
On top of that, the notion that the Knicks pre-Melo were just 'flirting' with an 8th spot is patently wrong if the implication was that it was only WITH Melo that they got to the playoffs (and the 6th seed).