MAtt Kemp is amazing and it would be hard losing him but I don't think you miss too much in the hitter portion of the trade. MCab, Upton, Stanton vs Kemp, Grandy,HRam is kind of a wash to me. Stanton is starting slow but he will turn it around. Upton may hit the 15 day DL but shouldn't be out for more than that. Getting Hamels and Strasburg makes your pitching a TON better. Strasburg could win the Cy Young and Hamels is great also. A little patience would be needed with the hitters to get out of their slumps but I would do the deal for the major boost in pitching and minimal to no loss in hitting, except SB's but with Gordon and Bonifacio you should probably be tops in that category anyways.
CF- C. Young
SP-Shields,Johnson,Carpenter,Vogelsong,Bucholz,Matusz,Peavy,De La Rosa