There's honestly nothing you can do about hunters atm for following reasons :
1) I highly doubt that developers, especially under GC's command, will go backwards in time for design approach as not only did they consider cast aimshot frustrating, but it'd be a nightmare to rebalance in PvE.
This is a good point and expanding on the PVE, it's unfortunate tToo many times people think this game is just about PVP. Whether all the trolls like it or not, there is a PVE aspect to the game that must remain balanced. Want to nerf chimera shot or kill shot? You kids think about its effect on PVE? Probably not.
And this was a forum for the slightly more intelligent. Apparently, turning into the Blizzard PVP forums.