My team:

QB: Romo
RB: Peterson, Forte (Bench Pierre Thomas, Bernard Scott)
WR: Mike Wallace, Antonio Brown (Bench Mike Thomas)
Flex: Victor Cruz
TE: Jake Ballard (Bench: Dallas Clark)
D: Bengals, K: Bailey

Peterson is a beast, but I just got offered this and it seems worth it:

My Peterson and Dallas Clark for
His Ryan Mathews, Aaron Hernandez, and Roddy White.

I'm pretty set to make the playoffs, so the main concern is that Mathews is set to face the Ravens in week 15. Thoughts?

Tough call, but I wouldn't take it if it was me. You do need WR help, but you dont really need the little TE upgrade, Mathews has more injury riks than Peterson and also has Tolbert to steal touches down the stretch.

That and Julio Jones will be back in ATL and poaching from Roddy. Peterson is a lock every week for great stats and I'd rather have that than what that package offers you.