Juice, here is the short of it: The Knicks' regular rotation guys still can't get on the same page. Starters: C (Turiaf, Jefferies), Amare, Melo, Billups, Fields; bench: TD, Shawne.
What you are asking is to throw even more uncertainty into an uncertain situation. Do you think that helps or hurts trying to get the main guys in to a flow?
Mason is hitting shots and is decent in a team defense sense, perhaps Walker is a better rebounder and can put the ball on the floor more, but I count these 2 guys as a wash (and note Walker has been hurt recently too).
What you are hoping and praying is that Brown, Balkman, Shelden, all dudes who have either proven they suck in the league (Balk, Shelden) or is a 2nd year, 2nd round pick (Brown) will suddenly wake up and both make a difference on a team and be the magic elixir to the Knicks' problems.
< 1% chance they would and 99% chance they won't.
IMHO, the main 8-9 guys need even more time on the court together, with all due consideration of minutes and general fatigue with a guy like Amare. Hey, if Amare is toast for the next week and the general consensus is that Turiaf and JJ are good for 10-20 minutes each, bring on Brown. Until then, Knicks gotta keep plugging away.