Well, it's not entirely out of range then, we would just give up 0.2 casting reduction on Lightning Bolt and Chain Lightning, which will lower the dps, but not as significatnly as the spec increases the dps. (Once the patch is live.)

That said though, we'll have to wait and see how the new elemental talent tree changes pan out dps wise. I imagine both spec choices might wield very little difference, and the utility in deep elemental (Thunderstorm) as well as Lava burst will become interesting again.