Do it! AP and Turner with P.Thomas as your starting RB's is great for the next 4 years.
RB: AP,P.Thomas,Turner, Greene, Stewart ....your set
WR: AJ, Marshall, Jennings, S.Smith....Your set
QB: Manning, Romo, Warner..Schaub....wow
You are 100% set at all the most important positions. He is trying to rebuild his team. Maybe trade Warner since his time is almost up. He has great value and someone might deal a youth player to upgrade this years team. Shaub is a fine #3.
I do this 100% because you have QB's,RBs,WR's and great TE's.