These are the announced changes we're planning in 2.3 for the Hunter class.

Serpent Sting, Immolation Trap and Explosive Trap will gain additional damage based on ranged attack power
http://forums.worldofwarcraft.com/thread.html?topicId=1778027086&postId=19976314984&sid=1#3

Wyvern Sting becoming an instant cast
http://forums.worldofwarcraft.com/thread.html?topicId=1778027086&postId=19976316044&sid=1#83

Arcane Shot will dispel one magic effect in addition to its normal damage
http://forums.worldofwarcraft.com/thread.html?topicId=1778027086&postId=19976316256&sid=1#109

Trueshot Aura no longer costs mana to cast and will last until cancelled
http://forums.worldofwarcraft.com/thread.html?topicId=1778027086&sid=1&pageNo=16#301