Seriously if you think that Lin and Shumpert were going to make difference your delusional this team as is does not have a long playoff run in them they might have a better regular season get a better seed and get out of the first round but thats where it stops.
Lin & Shump are a very good young backcourt. Those two guys combined with Chandler played suffocating D in the 4th. Shump would shut down the no1 perimeter option with on ball pressure. Lin while not a good on ball defender he plays passing lanes very well & got mad steals.
They worked very good with Chandler as their safety net. Melo would chip in with occasional good D plays as well.
Lin is needed on this team now that Kidd & Nash aren't available. Lin is great at getting to the Basket. He's top 5 in the league at finishing at the rim (PG position) no question.
Lin needs to work on his handles and passing out of traps, Shump needs to work on draining his set 3 pointer. If both of those guys get better doing that...we are ready for a deep playoff Run (assuming we get JR, Novack back).
I like Foye & he's better than Fields offensively, not sure about his defense though