Update: Replaced Polkelt with Far Sight due to upcoming nerfs.
Today I hit Diamond 10 at 71% winrate (21 - 6) Paladins being the toughest matchup. Still, this deck has been consistent vs DHs, Hunters (aggro and HL variant) and even against some greedier Control lists (ETC Warrior, Res Priest and Clown Druid with a bit of luck). It can grind out fast aggro decks with AoE's (unless mulligans and early draws are utter shit) and slower matchup attricion wars can be won through Galakrond, C'Thun's BK and/or Diligent + Serpentshrine or Dunk Tank bursts. At the moment I wouldn't swap out a single card, but if Paladins pick up after the next patch I'd toss in another Devolving Missile (and maybe even 1x Earth Shock/Wandmaker/Cobalt for good measure).
Overall, very pleased with the deck so far!