2.3 unofficial patch notes
Well, they're not really patch notes, but we've seen tons of posts concerning class changes in 2.3 lately (probably because the 2.2 went live), and it's way easier to list them like patch notes instead of doing 300 blue posts report. I planned to do them myself but bumped into this post in the way, which means that these notes are heavily based on it.
Quote from Blizzard staff
General
* Battlegrounds now have a buff period upon entering, and upon being resurrected at the Spirit Healer (similar to Arenas)
* Healing Reduction effects now affect all Drain spells and abilities (i.e. Mortal Strike vs Drain Life)
* Level 20-60 Quest EXP has been increased, while EXP to Level has been decreased
* New Title - Champion of the Naaru: Awarded to those who complete the Tempest Keep attunement quest at level 70
* New Flying Mount added. Requires 2,000g and Exalted with Cenarion Expedition
* New 10-Man Raid - Zul'Aman!
* Guild Banks are being added to the game.
* New Arena Relics have been added for more talent specs, and existing Relics have been renamed to create a more consistent naming convention
* +Healing bonus will give 33% of spell damage as well (1500 Healing bonus will give you 500 Spell damage)
Mages
* Damage coefficient reduction is removed from Improved Fireball/Frostbolt. (Source)
* New spell : Ritual of Refreshment. It will allow players to pick up their own stack of food/water, similar to a Soulwell. (Source)
* Evocation restores 15% of your total mana every 2 seconds instead of being a spirit-based mana regen increase. (Source)
* Arcane Meditation is being increased to 10/20/30% mana regeneration. (Source)
* Ice Barrier gains additional benefit from spell damage bonuses. However, the base absorb values of ranks 5 and 6 have been reduced. (Source)
Shamans
* New Talent - Elemental Focus: Puts you in a "focused state" after landing a melee critical strike, reducing the mana cost of your next Shock spell by 60%
* May equip 2-Handed Axes and 2-Handed Maces without spending talent points
* Frost Shock no longer has Diminishing Returns
* Shamanistic Rage will reduce damage taken by 30% in addition to it's current effects
* Spirit Weapons will reduce melee threat by 30%
* Mental Quickness adds 10/20/30% to +Dmg and +Healing based on your total Attack Power, in addition to it's current effects
Druids
* Cure Poison and Abolish Poison may now be cast in Tree of Life form
* Remove Curse may now be cast in Moonkin form
* Rebirth cooldown reduced to 20 minutes
* Intensity increased to 10/20/30% mana regeneration
Warlocks
* Ritual of Souls has had it's casting time significantly reduced
Warriors
* Mace Specialization proc has been reduced
* Mace Specialization Rage increased to 7
* Tactical Mastery now greatly increases threat from Mortal Strike and Bloodthirst while in Defensive Stance
* Devastate now combines the effects of Sunder Armor into it's effect, and is affected by all talents and items that affect Sunder Armor
Priests
* Power Word: Shield will receive additional benefit from +Dmg and +Healing
* Power Word: Shield (Rank 10, 11, 12) have had their base absorb lowered
* Pain Suppresion may target Friendly targets
* Pain Suppresion reduces Friendly target's threat by 5%
* Pain Suppresion reduces Friendly target's damage taken by 40%
* Pain Suppresion cooldown reduced to 2 minutes
* Meditaion increased to 10/20/30% mana regeneration
* Prayer of Healing gains additional benefit from +Dmg and +Healing
* Circle of Healing gains additional benefit from +Dmg and +Healing
* Circle of Healing's base healing has been reduced
* Holy Nova (Healing only) gains additional benefit from +Dmg and +Healing
Paladins
* Exorcism's mana cost has been lowered
* Holy Wrath's mana cost has been lowered
* Hammer of Wrath's mana cost has been lowered
* Vengeance has been increased to 30 seconds
* Improved Seal of the Crusader effect added to base abilitiy
* Improved Seal of the Crusader now gives the effects of Sanctified Crusader
* New Talent - Sanctified Seals: Increases your chance to critically hit with all spells and melee by 1/2/3%, and reduces the chance your Seals can be dispelled by 33/66/100%
* Crusader Strike cooldown is being lowered to 6 seconds. (Source)
Rogues
* Fleet Footed increased to 15% speed increase
* Deadly Throw travel speed is being significantly increased
* Deadly Throw snare duration is being slightly increased by 1 second
* Deadly Throw no longer triggers Ruthlessness
* Ruthlessness now only affects melee Finishing Moves
* Blind no longer requires a reagent
* Blind is now a physical attack
* Blind now shares the Diminishing Returns of Cyclone
* Blind is now affected by Diminishing Returns in PvE
* Shadowstep may now be used while not in stealth
* Shadowstep reduces threat caused by your next Ambush, Garrote, or Backstab by 50%
* Shadowstep cooldown increased to 40 seconds
* Dirty Deeds increases damage of special attacks by 10/20% against targets below 35% health
Hunters
* Wyvern Sting is now instant cast
* Arcane Shot (Rank 6+) will now dispel 1 Magic effect in addition to damage
* Serpent Sting, Immolation Trap, and Explosive Trap gain additional damage based on Ranged Attack Power
Engineering
* New Recipe - Field Repair Bot: Dropped(?) by Gan'arg Analyzers in Blade's Edge Mountains
* New Field Repair Bot is able to buy/sell
* Flying Mount added for Engineers. Regular and Epic version.
Fishing
* Fish Tracking may be learned from a journal, fished from crates
* New fish added near Karazhan and Zul'Aman
Cooking
* New Daily Quests
* New recipes added for fish found near Karazhan and Zul'Aman.