He has updated the build and made it much better than its initial itineration, but there's still room for improvement IMO.
There are better ways to get your spell power buffs than Power Surge. Both Structured Entropy or chugging pots are better.
The Mage Stone is a fine recommendation for dungeons and open world content, but switch to Apprentice for trials, where mobs have significant resistances.
Always use Dual Wield for your Overload bar, as DW provides more spell damage than a destruction staff. You should only use two destruction staffs if you're having trouble fitting Impulse on your bars, a skill that is only really necessary in SO and vDSA.
Do not neglect Elemental Expert in your champion points - its more DPS point-for-point than Thaumaturge. Do not spec into Bastion for PvE.
You will get more DPS while in Overload mode by slotting pets as opposed to shields and Dark Exchange.
I highly recommend working Velocious Curse into your rotation.
Check out the Sorcerer Theorycrafting section at www.tamrielfoundry.com for more details about maximising Sorcerer DPS.