I'll be running
this.
Piercing chill is producing a FoF/BF proc chance cleave, early frost is bad, and no flame orb until 81. Blizzard doesn't benefit from FoF so the chill on it is useless. The automatic barrier talent is cool, but not something I can keep in my current 85 build, so I'll play around with it now. Reforge for as much mastery as humanly possible.
Hope like hell the brain freeze bug on beta isn't going out in the patch that hits live though. It'll hurt frost pretty bad if it does.
Edit: 49% additional damage to frozen targets is hawt. I can live with 0.1s longer cast frostbolts.