Below are the current testable changes:
So on the surface, it's clear they'd like to make MM much more potent, BM a little more potent, and SV far less potent. That said, they're going to shift the earth a bit more with two rather huge changes; 1) Cobra and steady will eventually benefit from haste, and 2) Auto-shot on the move -- without stutter steps.
I know I don't need or even want the auto-shot change. I find myself on the verge of attacking the wrong mob plenty of times and just need to move until my fingers can find the escape button. (Since you can no longer click the ground to unselect your current target.)
Other important questions:
#3 - Is SV still getting the -5% to agility nerf too?
#2 - Will the Chaotic meta gem requirements benefit SV more than MM?
#1 - Will SV start firing Arcane Shots instead of Explosive Shots now?