New Hunter talent trees

[Drasca]

why would you waste time (weapon speed +3 sec) on a slow shot

Its an opener.

Sometimes you want the slow speed. In pvp, if you have someone freeze trapped, you tend to aim shot. In PvE If you're facing enemies your warrior is about to charge, and we're the raid is going at a steadily fast pace, all ranged open with their slow big attacks to give time for warrior to take initial aggro. Beyond that, you get the interesting 'prebuffed damage' effect when many ranged dps do this where the initial enemy's hp goes down by a big chunk, and is whittled down to nothingness afterward before 2nd or 3rd nukes can be put in.

Its not a mid-combat skill, your multishot and arcane is just more fun for that, but as an opener its fantastic. Slow delayed attacks are better for aggro management, and opening when you have time to.