I agree with you about Campbell.. his +/- hurts too.. I think he would be better to add into a trade cause I don't know if I should drop him...
ometimes the best move you can make is no move.
I don't see a player on your roster that I'd want to replace. At least not for free.
Get out there and start throwing offers to people. Try to get big time upgrades. The only guy I'd think about dropping is Campbell as he's incredibly weak in peripherals and when he's not scoring he's not doing much else. Grabbing Burns for him might be a worthwhile play, as you can ride out his forward playing streak and ice a forward from a D slot.