This spec is done for. With the recent changes it looks like they didn't like us going in this direction.
Mental Quickness: Reduced the mana cost of instant cast Shaman spells by 2/4/6% and increases spell power by an amount equal to 23/46/70% of your agility.
But the good news is that last night they acknowledged the Elemental DPS issue and are looking into it more.

We have looked at the issue some more and do have concerns that even after these changes that Elemental shaman damage will be too low.

I'll address the problem again when we have an idea for how we're going to fix it, but this is a "soon" fix not a "distant future" fix.