I ran into a gallywix. I want him, even though I won. I probably won because my iron sensei got my piloted shredder up to 8/7. I'm still not even sure if iron sensei is worth running but it is fun as hell.
Midrange rogue is such a hard deck to pilot and that hasn't changed with gvg. It suffers from a somewhat awkward curve where you are sometimes, ideally even, playing cards off curve. Autobarber seems pointless to drop without having a weapon up already although I have done it when I have had iron sensei ready to hit turn 3.
Tinkmaster sharpsword oil is like a pyroblast if it is set up right. You get 6 damage out of weapon swings (if used on the hero power, more if used on weapons with more charges), 3 damage on a friendly minion. So 9 damage out of a 4 cost combo card.
Autobarber is pretty damn good, assuming you can set it up right without screwing your curve up and floating mana when you don't want to.
I've only just started testing the arcane nullifier out. That is the 4cc 2/5 mech with the faerie dragon shroud text. Sharpsword oil and iron sensei should buff that thing up well and it should protect the iron sensei as well.