Patch 2.4.3 PTR notes

General
Dispel effects will no longer attempt to remove effects that have 100% dispel resistance.
Parry Rating, Defense Rating, and Block Rating: Low-level players will now convert these ratings into their corresponding defensive stats at the same rate as level 34 players.
Haris Pilton has launched a new line of bags and jewelry. Check her out in the World's End Tavern!
Mounts at 30?! Yes, it's true: Apprentice Riding and mounts are now available at level 30. Training costs 35 gold.
Blood Elf flightmasters outside of Silvermoon City and Tranquillien have traded in their bats for glorious fire-breathing dragonhawks.
Alcohol cooldowns have been rolled into Drinks: All 10-second cooldowns have been removed and replaced with the 1-second Drink cooldown.
Numerous flying non-combat pets have had their flight height modified to no longer skim along the ground: captured firefly, dragonhawk hatchlings, moths, owls, parrots, phoenix hatchling, spirit of summer, sprite darter, and tiny sporebat.
Nether Ray Fry (a non-combat pet) is now available from the Skyguard Quartermaster. This requires an Exalted reputation with Sha'tari Skyguard.
Equipping an item will now cancel any spell cast currently in progress.
Placing an item in your bank will now cancel any spell cast currently in progress if the spell was cast by that item.
You can no longer move backwards to stop racing rams.
When a stun wears off, the creature that was stunned will prefer the last target with the highest threat, versus the current target.

Druids
Barkskin: The cost of this spell is now reduced by Tree of Life Form.

Hunters
Growl: Pets will no longer generate additional threat from this ability based on attack power buffs cast on them. Attack power buffs on their master will still indirectly increase the threat generated by the pet's Growl.
Pet Aggro: Pets will no longer generate threat immediately from being summoned.
Scare Beast: This spell will now be limited correctly to one target.

Paladins
Greater Blessing of Light Rank 1: This spell will no longer overwrite Greater Blessing of Light Rank 2.
Summon Warhorse is now available at level 30.

Priests
Mind Vision: This effect will now be cancelled immediately on targets who use an Invisibility Potion or Gnomish Cloaking Device.
Spiritual Healing: Ranks 2-5 of this talent will no longer prevent refreshing Prayer of Mending.

Rogues
Cheat Death: This talent has been rebalanced significantly. Killing blows are no longer 100% absorbed. If the Rogue is below 10% health, the killing blow is still completely absorbed; if the Rogue is over 10% health, enough damage will be absorbed to reduce the Rogue's health down to 10%. For the following 3 seconds, damage is not always reduced by 90%; it is now reduced by a maximum of 90%, depending on how much resilience the Rogue has. The damage reduction will be four times the damage reduction resilience causes against critical strikes.

Shaman
Earth Elemental: This pet will now leash back to its totem when pulled beyond 50 yards away.
Lightning Overload: This talent will no longer do excessive damage when used with Lightning Bolt Ranks 2-10.

Warlocks
Curse of Shadows: This spell has been removed.
Curse of Elements: This spell now applies to Arcane and Shadow damage, as well as Frost and Fire.
Demonic Sacrifice: This ability will now interact correctly with the Spirit Guide resurrection system in battlegrounds. A sacrificed pet will not be resummoned on death, and will not prevent keeping a record of the most recently created pet.
Health Funnel: This ability will now cancel channeling when the target pet is Banished.
Ritual of Summoning: The mana cost of this spell will now be properly deducted when cast.
Summon Felsteed is now available at level 30.

Warrior
Revenge: Ranks 1-5 of this ability now have damage ranges instead of fixed damage values (like ranks 6-8.)

PvP
The Warsong Gulch flag can no longer be picked up at the same time as a flag is capped.

Professions
Alchemy
Philosopher's Stone now requires 200 Alchemy.
Cooking
Juicy Bear Burgers now correctly increase healing as well as spell damage.
Jewelcrafting
Activated beneficial effects from jewelcrafting trinkets can no longer be dispelled.
Mining
Green quality gems can be found in mining nodes again. The drop rate of blue gems from mining nodes remains unchanged.
Tailoring
Removed the cooldown from regular Mooncloth.
Herb bags can now hold Un'goro Soil and Evergreen Pouches.
Mycah of Sporeggar has discovered how to create 28 slot herb bags.
New Tailoring patterns are available from Haughty Modiste in Steamwheedle Port, Tanaris: Haliscan Jacket and Haliscan Pantaloons.

Quests
Bhag'thera now spawns at a normal quest spawn rate.
For the quests, Intercepting the Mana Cells and Maintaining the Sunwell Portal, phased characters will not be able to see non-phased character AoE effects and vice-versa.
For the quests, Intercepting the Mana Cells and Maintaining the Sunwell Portal, pets gaining/losing phase status will now properly break off combat from unphased/phased opponents.

Dungeons and Raids
Players can now be summoned to raid instances from heroic dungeons.
Magister's Terrace
The Stun component to the Sunblade Mage Guard Glaive Throw has been removed and the Bounce range reduced.
Vexallus and Kael'thas are now tauntable in Heroic mode.
Vexallus' damage caused by Pure Energy has been decreased.
Kael'thas' Arcane Sphere has had its visual size increased. His Arcane Sphere attack has had its range decreased and the damage/second of Phase two on Normal mode has been decreased. (Heroic mode remains unchanged.)
Sunblade Warlocks have had their damage reduced slightly.
Fel Crystals in the Selin Fireheart encounter have had their health reduced slightly.
Warlord Salaris and Kagani Nightstrike have had their damage output reduced slightly.
Sunwell Plateau
Creatures in the area around Grand Warlock Alythess and Lady Sacrolash will no longer spawn while the twins are in combat.
Nether Protection will now correctly trigger from Kil'jaeden's Shield Orb Shadow Bolts.
Vanish now correctly wipes threat on Kil'jaeden.

Items
Bow of the Verdant Keeper's Aim: This item's triggered effect no longer breaks the effect of Scatter Shot.
Brutal Gladiator's Pummeler has had its Stamina value increased to the appropriate value.
Clockwork Robot Bots fight amongst themselves again...without attacking people in the arena. Well... they'll blow up other Bots in the arena, but you know what we mean.
The Eredar Twins will now award the same items regardless of which order they are killed in.
Invisibility Potions: These potions now are on the same cooldown as other combat consumable potions (such as mana potions.)
Pendant of the Violet Eye: This item will again work correctly with Holy Light and Flash of Light.
Shattered Sun Pendant of Acumen: The triggered effect from this Item can now occur on periodic damage ticks.
Thori'dal, the Star's Fury is now Unique as intended.
Vengeful Gladiator's Baton of Light: This item now appears in the correct position on the vendor list