Level 15: Presence of mind is replaced by Evanesce. No word on what's happening with POM. Evanesce lets you "fade into the nether" for three seconds, avoiding all attacks. It replaces Ice Block and can be cast while casting a "cast time" spell. 45 sec cooldown.
Level 75, first talent: Nether Tempest, Living Bomb, and Frost Bomb are all still talents, but they are now only available to Arcane, Fire, and Frost respectively. All the bombs last 12 seconds. So the first lever 75 talents are:
Arcane – "Nether Tempest: " Can only cast one at a time. Each time it does damage it has a 10% chance to activate Arcane Missile and also do damage to opponents within 10 yards. That secondary damage can also hit the main target.
Fire – "Living Bomb:" Same as it is now. The target burns and then explodes when the timer runs out. Still spread by Inferno Blast.
Frost – "Frost Bomb:" Your Ice Lances that hit the target while frozen cause the bomb to damage the target and damage all enemies within 10 yards.
Level 75, 2nd talent, "Unstable Magic:" All specs. Your Arcane Blast, Firebolt, and Frostbolt all have a chance to explode on impact, doing more damage to the target and also damaging nearby targets.
Level 75: 3rd talent – The next talent replaces Frost Nova. Target an enemy or ally as the center of the effect and an energy wave does damage to all targets in the area and 100% additional damage if the main target in an enemy. Each spec gets a different effect that adds to this:
Arcane's Supernova "knocks them up." (I'm sure the wording on that will change…)
Fire gets Blast Wave: All the targets effects are slowed for 4 seconds.
Frost gets Ice Nova: All the enemies are frozen.
Level 90: Incanter's Ward and Invocation are replaced. Who knows what's happening with those two. They are replaced, for all Mage specs, by:
Mirror Image. Yes, that Mirror Image. It's now a lev 90 talent.
Incanter's Flow: This looks interesting. You now have a ten second cycle. In 5 seconds you will have 25% more power (5% per second) and then it drops back at the same rate, so in ten seconds you're back to "normal." Then it repeats. At 5, 15, 25, etc. seconds you will be at max power. 10, 20, 30, etc. you will be back to normal. As soon as this looks even close to final I expect an addon to be tracking this.
The first level 100 talent extends the duration of certain spells:
Arcane – "Overpowered:" Casting your Arcane Missiles extends your Arcane Power by 2 seconds.
Fire – "Kindling:" Crits from Fireball, Pyroblast, and Inferno Blast extend your Combustion by 1 second.
Frost – "Thermal Void:" Casting Ice Lance extends your Icy Veins by 2 seconds.
Prismatic Crystal All specs. (Was Focusing Crystal) puts a crystal at the targeted location. Only you can attack it and it takes 130% damage from your attacks. Any time it takes damage it instantly releases that damage, splitting it evenly among all enemies within 8 yards.
The third talent looks pretty cool, dealing area damage.
Arcane gets "Arcane Orb:" Your Arcane Orb travels up to 40 yards doing damage to everything it passes through and it generates an Arcane Charge every time it does damage.
Fire gets "Meteor:" Drops a fraggin' meteor!! Doing damage to an 8 yard area, also burning the ground doing continuous damage to all who remain in the fire.
Frost gets "Comet Storm:" Comets! 7 icy comets bombard the target area.