Beast Mastery
Aspect of the Fox now procs from melee attacks you receive instead of whenever you take damage.
Kill Command now requires your pet to be in combat.
Tame Beast no longer reduces your armor by 100%.
Envenomation renamed to Killing Streak and revamped - When you score two Kill Command critical hits in a row, your third will deal 15/30% more damage and have its cost reduced by 5/10 focus.
Cobra Strikes now has a 5/10/15% chance to proc from any Arcane Shot instead of a 20/40/60% chance to proc from a critical Arcane Shot or Kill Command.

Marksmanship
Multi-Shot now deals 55% of weapon damage to all enemies within 8 yards of the target.
Chimera Shot revamped - An instant shot that causes ranged weapon damage plus [ 24% of RAP + 401 ], refreshing the duration of your Serpent Sting and healing you for 5% of your total health.
Careful Aim now affects target above 80% health, up from 60%.

Survival
Traps had their description modified, apparently the restriction of "Only one trap can be active at a time." no longer exists.
Cobra Shot is now a Survival skill (Old - Beast Mastery) and now deals weapon damage plus [ 8.6% of RAP + 276.81 ] in the form of Nature damage.
Frost Trap is now Ice Trap
Black Arrow now only shares a cooldown with Explosive Trap and Immolation Trap.
Improved Tracking revamped - now Increases ranged haste by 1/2/3%.