There are further changes coming to Beast Mastery in the upcoming patch, as some of the buffs the spec received recently on the PTR, to combat the Neltharax bow nerfs, have been significantly toned down.

Beast Mastery (Source)

After some discussion and monitoring feedback on these changes, there are a few adjustments being made for the next PTR build for Beast Mastery Hunters.

Kill Command damage will be increased by 10%, down from 25%.
Barbed Shot damage will be increased by 12%, down from 25%.
Kill Cleave (talent) will now transfer 60% of Kill Command’s damage, up from 50%.

The original post will be updated to reflect these changes as well.