No, chadz finally managed to encourage teamplay instead of mindless killhunting. Rewarding kills leads to everyone rolling killer builds and ignoring the support roles.
All this "support would still be rewarded, killers are just rewarded more" is nonsense. It implies that killers are more important for their team than the other guys, which obviously is not true. As an easy example, a few cavalrymen (or even fast infantry) can harass a much larger group of enemies enough that they run after trying to kill them, allowing their teammates to overwhelm the outnumbered force and then finish off the heroic pursuers. The harassers may not get a single kill but they still contribute hugely to their teams victory.
Same goes for pikemen poking and supporting behind the front line and protecting flanks from cavalry, ranged taking down horses from afar etc. etc. There's just so much you can do besides kill.