HDL

    * Consumable ammunition has been removed from the game. Arrows and bullets no longer stack, but are not consumed. Ranged attack speed bonus gained from quivers and ammo bags will be preserved in a different capacity.
    * A new tier of hunter pet talents have been added. In particular, this allows Beastmaster hunters to improve their damage per second (DPS) with their 51 point talent.
    * Hunting Party – this talent has been reduced to 3 ranks and also grants a passive bonus to the hunter.
    * Piercing Shots – this talent has been changed. Your Aimed, Steady and Chimera Shots cause the target to bleed for 10/20/30% of damage dealt for 8 sec.
    * Sniper Training – this talent has been changed. After standing still for 6 sec, you gain a 2/4/6% damage bonus to Steady, Aimed and Explosive Shot.
    * We are also looking to add additional trap functionality to Survival.

Updated:

• Frost Trap: If the target who triggers Frost Trap is immune to its effect, the Frost Trap area effect will no longer be triggered.

Talents
Beast Mastery

• Improved Aspect of the Hawk now has a new spell effect.
• Improved Wing Clip: This talent has been removed.

Marksmanship

• Piercing Shots re-designed: Your critical Aimed, Steady and Chimera Shots cause the target to bleed for 10/20/30% of the damage dealt over 8 sec.
• Ranged Weapon Specialization: Points reduced from 5 to 3, 1/3/5%.
• Wild Quiver: Chance increased to 4/8/12%, up from 4/7/10%. Damage increased from 50% of an auto shot, to 80%.

Survival

• Hunting Party: This talent has been reduced to 3-points, and now increases your total Agility by an additional 1/2/3%.
• Lock and Load re-designed: You now have a 33/66/100% chance when you trap a target with Freezing Trap, Freezing Arrow or Frost Trap and a 2/4/6% chance when you deal periodic damage with your Immolation Trap or Black Arrow to cause your next 2 Arcane Shot or Explosive Shot spells to trigger no cooldown, cost no mana and consume no ammo. This now has a new spell effect and sound.
• New Talent: Trap Launcher: When activated, your next Trap will be launched instantly at the enemy target. 1 minute cooldown.
• T.N.T. re-designed: Increases the damage done by your Explosive Shot, Explosive Trap and Immolation Trap by 2/4/6%, and gives your Explosive Shot a 33/66/100% chance to refresh the duration of your Immolation Trap effect on the target.
• Trap Mastery: This talent has been moved up to tier-2, up from tier-9.
• Wyvern Sting duration increased from 12 sec to 30 sec. PvP duration reduced from 10 sec to 6 sec.

Pets

• Roar of Sacrifice can be used on the hunter only.
• Stampede (rhino) only affects 1 target, but adds a 25% bleed damage debuff (that does not stack with Mangle etc.) in addition to its knockback.
  

# Wyvern Sting duration increased from 12 sec to 30 sec. PvP duration reduced from 10 sec to 6 sec.

Wyvern Sting is great news for PVE. I use this a lot when kiting multiple mobs, trap one, sting another, and kite the rest. The 12 sec duration was good, but 30 sec is even better.

The reduction for PVP is not so great.

Undocumented changes:

Beast Mastery
Skills

• *New Skill* Call Stabled Pet - A pet of your choice busts out of its stable and joins you no matter where you are, replacing your current pet. Cannot be used in combat. Instant. 30 min cooldown. Requires Level 80.

Marksmanship
Skills

• Kill Shot no longer has a minimum range. It can now be used in melee range.

Talents

• Wild Quiver (Tier 9) now increases your chance to shoot an additional shot when doing damage with your auto shot, dealing 80% Nature damage, by 4/8/12%. (Previously it dealt 50% nature damage and had a 4/7/10% chance.)
• Piercing Shots (Tier 7) Your critical Aimed, Steady and Chimera Shots cause the target to bleed for 10/20/30% of the damage dealt over 8 sec. (Previously triggered 2/4/6% armor ignore).
• Ranged Weapon Specialization (Tier 6) is now a 3 point talent, increasing damage with ranged weapons by 1/3/5%. (Previously a 5 point talent increasing damage by 1/2/3/4/5%)

Survival
Skills

• Disengage cooldown increased to 30 secs. (Previously was 25 secs)

Talents

• Hunting Party (Tier 10) is now a 3 point talent, increasing agility by 1/2/3% and your Arcane Shot, Explosive Shot and Steady Shot critical strikes have a 33/66/100% chance to grant up to 10 party or raid members mana regeneration equal to 0.25% of the maximum mana per second. Lasts for 15 sec.
• Trap Mastery moved from Tier 9 to Tier 2 and is now a 3 point talent. Increases the duration of Frost and Freezing trap by 10/20/30%, Periodic damage of Immolation and Explosive trap by 10/20/30%, and number of snakes summoned by Snake Trap by 30%. (Previously was just 1 point)
• *New Talent* Black Arrow (Tier 9) - Fires a Black Arrow at the target, increasing all damage done by you to the target by 6% and dealing [ 10% of RAP + 785 ] Shadow damage over 15 sec. Costs 6% base mana. 5-35 yard range. Instant Cast. 30 sec cooldown.
• Sniper Training (Tier 9) has been changed to increase the critical strike chance of your Kill Shot ability by 5/10/15%, and while standing still for 6 sec., you gain Sniper Training increasing the damage done by your Steady Shot, Aimed Shot, Black Arrow and Explosive Shot by 2/4/6% Lasts 15 sec. (Previously increased damage and critical strike chance based on your range to the target)
• Wyvern Sting (Tier 7) now lasts 30 sec on the target. (Previously lasted 12 sec)
• T.N.T. (Tier 4) now increases the damage done by your Explosive Shot,  Explosive Trap and Immolation Trap by 2%. (Previously increased critical strike chance of explosive shot and and gave it a chance to stun the target)
• Lock and Load (Tier 4) now has a 33/66/100% chance to proc off Freezing Shot, Freezing Trap, and Frost Trap, and a 3/7/10% chance to proc off the periodic damage of Immolation Trap and Black Arrow. (Previously worked on all traps and included serpent sting)
• Improved Wing Clip has been removed from the game.
  

Re: Pets
I really like the fact that I hopefully will be able to choose a pet based on the encounter. I have one for every situation but it sure was a pain having to make the trek to the Stable Master to get the pet I needed. I remember Ghostcrawler mentioned this was something they were hoping to implement. He did not give a timeframe. Hopefully we'll see this sooner, rather than later.

Re: Lock and Load
I wish it still worked on all traps. I love trapping and I get L&L a lot! It looks like Blizzard wants S Hunters to use Black Arrow instead of (or along with) Serpent Sting for the Lock and Load talent.

The undocumented changes, for the most part, seem fine for Survival Hunters. I'll have to try them out to see what I think. I was actually going to try out Improved Wingclip to see how I liked it. I use Wingclip while soloing. I've used it in some instances too, not sure how viable that will be in the raid setting though. I lay a trap, WC, gain distance, kite, and fire my shot rotation. I guess I won't have the chance now since it's being removed from the game.