Most obviously for multi-player adventures where you just want to be sure the other players have recorded kills so they'll be rewarded with loot, it would be super handy if a message was posted to your News tab when another player performed a buff kill on any camp. Or even better if the "adventure info" screen showed which players had made kills (rather than just "active", which seems to be true as soon as they've accepted the invitation, even if they haven't even visited the adventure).