Thanks everyone.
To clarify, yes the penalty for keeping players is I have to take in their respective round.
We start 2RBs plus flex of WR/RB/TE. Not PPR league.
I've done a few mocks with different combinations of keepers and it does seem like keeping AP/Forte still allows me to pick up solid WRs in rounds.
I've also got offer for Jeffery and 7th for extra 4th round pick.