Mage changes in WotLK Beta Build 8870

Ok so Wrath of the Lich King beta build 8770 now online. Here’s the Mage changes:

Mages

• Arcane Blast effect duration reduced to 3 seconds, and now increases damage by 15/30/45% instead of reducing cast time.
• Arcane Focus (Arcane) is now 3 ranks and increases chance to hit and reduces mana cost of Arcane spells by 1/2/3%.
• Arcane Fortitude moved to tier 2, increased to 3 ranks, now increases armor equal to 50/100/150% of Intellect.
• Arcane Impact renamed Spell Impact and now affects Blast Wave, Fire Blast, Cone of Cold, and Ice Lance.
• Arcane Potency now applies when Presence of Mind is active, talent prerequisite changed to Presence of Mind.
• Arcane Subtlety now reduces the chance your spells will be dispelled by 15/35%, and no longer reduces the resistance of targets.
• Arctic Reach now also affects Deep Freeze.
• Blast Wave now knocks all affected targets back.
• Conjured mana gems no longer disappear from your backpack
  after being logged out for more than 15 minutes. Higher ranks of
  Conjure Mana Gem will recharge an existing mana gem to maximum charges.
• Counterspell now costs 9% of base mana.
• Elemental Precision moved to tier 2.
• Empowered Arcane Missiles renamed Arcane Empowerment and
  no longer increases mana cost. It now also increases damage caused by
  Arcane Blast.
• Empowered Fireball reduced to 3 ranks, now increases damage by 5/10/15% of spell power.
• Empowered Frostbolt reduced to 2 ranks, increases damage by 5/10% of spell power and increases critical hit chance by 2/4%.
• Flame Throwing moved to tier 3.
• Frost Armor, Ice Armor, Mage Armor and Molten Armor are no longer Magic effects and cannot be dispelled.
• Frost Channeling now reduces mana cost of all spells by 4/7/10%.
• Frost Warding now increases armor and resistances of
  Frost/Ice Armor by 25/50%, now gives Frost Ward and Fire Ward a 15/30/5
  chance to negate damage caused and restore mana equal to damage caused
  by the warded spell.
• Ice Floes renamed Cold as Ice, now reduces cooldown of
  Cold Snap, Ice Barrier, Summon Water Elemental, and Deep Freeze by
  10/20%.
• Impact moved to tier 3, reduced to 3 ranks for 4/7/10%
  chance to trigger, now triggers from any damaging spell (Fire, Frost or
  Arcane).
• Improved Blink now also reduces mana cost by 25/50%.
• Improved Counterspell now always silences the target for 2/4 seconds.
• Improved Fire Blast moved to tier 1, reduced to 2 ranks, reduces the cooldown by 1/2 seconds.
• Improved Flamestrike moved to tier 2, renamed World in
  Flames, now increases the critical hit chance of Flamestrike, Blast
  Wave, Dragon’s Breath, Living Bomb, Blizzard, and Arcane Explosion by
  2/4/6%.
• Improved Frost Nova renamed Ice Floes, moved to tier 1,
  increased to 3 ranks, now reduces cooldown of Frost Nova, Cone of Cold,
  Ice Block, and Icy Veins by 7/14/20%.
• Improved Mana Shield has been renamed to Arcane Shielding , reduces mana lost per damage absorbed by 17/33%,and now also increases resistances granged by Mage Armor by 25/50%.
• Invisibility now makes the caster invisible after 3 seconds, reduced from 5 seconds.
• Magic Absorption reduced to 2 ranks, increases resistances by .5/1 point per level, and restores 1/3% of total mana on a resist.
• Magic Attunement (Arcane) now also increases the range of your Arcane spells by 3/6 yards.
• Mana Shield now drains 1.5 mana per damage absorbed.
• Master of Elements now affects all spell criticals.
• Mind Mastery reduced to 3/6/9/12/15%.
• Molten Shields now gives Fire Ward and Frost Ward spells a 15/30% chance to reflect the warded spell.
• Polymorph now costs 12% of base mana.
• Portal spells now cost 18% of base mana.
• Prismatic Cloak (Arcane)increased to 3 ranks for 1/2/3% and now also reduces the fade time of Invisibility by 1/2 seconds.
• Pyroblast cast time has been reduced to 5 seconds.
• Remove Lesser Curse has been renamed to Remove Curse.
• Shatter no longer has a prerequisite.
• Slow Fall now costs 6% of base mana.
• Summoned Water Elemental’s Waterbolt range increased, mana cost reduced, Freeze range increased, mana cost increased.
• Teleport spells now cost 9% of base mana.
• Winter’s Chill reduced to 3 ranks, Frost damage spells
  have a 33/66/100% chance to trigger the effect and the effect increases
  chance to crit with Arcane, Fire and Frost spells.

Nice big book of em there…Mage talent calculator up and running at MMO-champion as well. Spicytunas has posted his thoughts on the new Mage changes. He puts more thought into a post like this then I do so go read up .