Specifically, note the BIG BM nerf... Readiness no longer resets Beastial Wrath. Another PVE nerf courtesy of PVP.Arcane Shot had its damage and focus cost increased by 50%.
Hunter's Mark now has a duration of 20 seconds while in PvP combat (down from 30 seconds).
Readiness now finishes the cooldowns on Rapid Fire, Feign Death, Deterrence, Disengage, and Camouflage when activated (was all Hunter abilities with a base cooldown of less than 5 minutes).
Revive Pet no longer requires the Hunter to have line-of-sight to their pet.
Aspect of the Iron Hawk now reduces all damage taken by 10%, down from 15%.
Narrow Escape's root effect is now a nature spell (was a physical spell).
Silencing Shot is no longer a talent and is now an ability for Marksman Hunters.
Spirit Bond now regenerates 3% of total health every 2 seconds while the Hunter's pet is active (up from 2%).
Wyvern Sting now has a range of 40 yards (up from 35 yards).
Glyph of Mend Pet now has a 100% chance of cleansing 1 Curse, Disease, Magic or Poison effect from the Hunter's pet on each tick (up from 50% chance).
Glyph of No Escape now increases the ranged critical strike chance against targets affected by the Hunter's Freezing Trap by 100% (up from 20% chance).
Explosive Trap no longer shares a cooldown with Black Arrow but can no longer activate Lock and Load.
I'll let the SV hunters chime in on the Explosive trap change. Don't know the effect of that.