The old talents: http://www.mmo-champion.com/talent/?mage
The new talents: http://www.worldofwarcraft.com/info/.../talents2.html
I myself think the newer set of talents is much better.
There are some changes in the Arcane tree for WoTK. Most notable being Missile Barrage. I think it sounds cool.
Also 6% more haste is kinda nice too, though it could mess up your rotation if you lack hate/have too much haste.
I also think http://www.worldofwarcraft.com/info/...00000000000000
would be a good spec with the new talents. This means that 15% of the time you will be casting Arcane Missiles. (This means AM might be viable for PvE raiding if the mana isn't too high etc). Also, with Arcane Barrage every 3 seconds, it may seem that Frostbolt may not really be needed as much. Except for the times that you need to reset the debuff/while you have AP up, but not much mana. That's why I didn't both with 15% less mana for Frostbolts.
6% spell haste is also nice. Which makes an Arcane Blast 0.09 seconds faster casting time, when it's at debuffx3. And of course reduces the length of the GCD. 6% is a fair amount if you ask me, since a lot of Mages in TBC went for 20% because it made Fireballs 2.5 seconds instead of 3 seconds.
Anyways, as the topic says, which talent tree was better off for Arcane? The old one? Or, the new one?
Discuss. Go, go!