I would stay put. I think Johnson is in for a big year, and carson palmer is coming in with a full pre-season under his belt, so oakland receivers may be more consistent this year.
I do not trust lynch and while I like k.smith, there is risk here.
Depends on your needs though. If you have no solid RB2, then maybe you need this trade.
10-team keeper league - QB, 2 RB, 2 WR, TE, FLEX, D/ST, K
QB - Newton, Palmer
RB - R. Matthews, Martin, Stewart, F. Jones, B. Brown
WR - Julio, Austin, Maclin, Heyward-Bey, Amendola, D. Alexander
TE - Graham
D/ST - Bears
K - Tynes