Nash would be a great addition and I think given what he's been saddled with in terms of teammates the last year, playing with Melo, STAT, Tyson etc would be an upgrade and give him the kind of help that would make his job easier. With good depth Nash wouldn't have to "carry" this team and that is something older players all need help with. Older players like KG, Dirk etc need to have good talent around them so that they can get a break from the work load a younger star is able to handle ie Lebron and Wade.
Like the Mavs the Knicks will need superior depth to overcome the talent of Lebron and Wade and get out of the East. I do believe it's very possible, but i'm not expecting STAT and Melo to rise to the level of a Lebron and Wade cuz they simply aren't the same type of players. STAT and Melo are 2 finishers rather than 2 creators that can also finish at a high level. That's why it's imperative that we add more PASSERS to the roster. You can't have a roster full of guys that are there to finish a play and aren't as good at creating for others. That's why having Lin worked cuz he basically played the role of Nash and if we should ever add guys like Nash and Odom, then you are increasing the teams ability to move the ball effectively and allow STAT, Melo, Novak and Tyson to be the HIGH EFFICIENCY scorers they're meant to be. Lebron and Wade are two high level ball distributors and it makes a real difference since they handle the ball a LOT.
Grunwald knows that players like that have value. That's why they kept trying to add vets like Kidd and Hill. Ball movement is a huge factor and especially if you have a star like Melo that is a ball stopper and the rest of your stars are also guys that are used to catching and scoring. Heck, someone has to pass the ball!!!