Got told to "try a primary, it might help your k/d" in IB by a guy I kept running into. Unfortunately for him I was running Striker.
I don't care about my k/d, multiple Thorn bounties in yr1 put paid to that. Guess he was just salty that they lost against a team of randoms in advantage-enabled Crucible as part of a PvP clan (and one that should know better than sending messages afterwards, at that...)