I think the talent review really boosts the Elementalist build. the "cookie cutter" (as cookie cutter as you can get with a not popular build) is 27frost/24 fire with the highlights being ice block, and shatter in ice and blastwave and critical mass in fire. This gives you huge insta cast dmg potential. The strength of the elementalist build is that you basically never have to stand still to unload your dmg and you have 3 get of jail cards in frost nova, blink, and ice block. Ice block is great for offense as you can use it to wait for your cooldowns on frost nova, fireblast, and CoC. Cold snap gives you another Frost Nova + CoC shatter combo.
The biggest disadvantage to Elementalist is mana inefficiency and lack of Improved CS (now that IAE and Evoc are trainable)
Here's a typical chain of spells:
Frostbolt opening (maybe 2) 800-1600
Frost Nova 200
CoC 600 (1200)
(Blink if stunned or movement impaired)
Blastwave 600 (900)
Fireblast 600
Coldsnap
Frost Nova 200
CoC 600 (1200)
Frost Bolt 800 (1600)
At the very minimum assuming no FB opening and no shatter crits, you're sitting on 3600 dmg. With all the shatters critting and 1 FB opening you'd be sitting on 6700 dmg. This is without trinketing and it's all insta cast except for the FB opening and FB ending. The one bad thing - you'll probably be OOM. Master of the Elements helps alleviate this a little bit.
You still have one more get of jail card at this point if whatever you were fighting isn't dead yet - Ice block.
Here's the build that I like with the new mage talents:
http://www.wowhead.com/talent/?RZVxrc0cuZiVczMVs
Assuming a fairly well geared mage has around 15% chance to crit from base crit, gear, and int: Non shattered: 25% crit for fireblast, 21% blastwave, 25% scorch, 45% flamestrike. Shattered: 75% fireblast, 71% blastwave, 65% CoC, 65% frostbolt.
This is definitely a PvP-focused build. Mana efficiency is alsmost nonexistant.