We got a nifty hotfix at the night, let me just quote Zarhym:
Specifically, we increased the damage of the signature abilities (Chimera Shot, Black Arrow, Explosive Shot, and Kill Command) by 15-25%. This will both improve overall damage-dealing and make sure that these abilities are prioritized higher than other shots. We think this will bring hunters to a good enough state until they hit 85. Aspect of the Fox and Cobra Shot solve some specific issues at higher levels. Marksman hunters may still trump Survival and Beastmaster hunters until they’re 85, since their rotations rely a little on Cobra Shot.