Originally Posted by Falchor 
Of all the negatives I've heard (related to DLC and other issues), this is the one most troubling to me. If I play the single-player game well, I should receive full rewards within the single-player game. If I play multiplayer well, I should receive full rewards within the multi-player framework, ala Red Dead Redemption or any other singe-player focused game with a multi-player addon.
It isn't new, though. In my eyes the same mechanism led into multiplayer parts of games having exclusive content - like races being playable only there.
This bias towards multiplayer is not new. It merely reaches its pinnacle about now.