Hearthpwn

Quote from Mechwarper jump

It's pretty fun, I just wonder if they actually bothered playtesting this though because even if you catch up as Rag, reach 10 mana, break your hammer etc you're still behind because Nef pulls shit like 0 mana flamestrikes, open the gates + savage roar etc :P

 No, they did not playtest this. 
You'll see a couple people claiming suspicious stats with rag/nef, but by and large Ragnaros is far worse. 

They made the worse deck harder to play. It's not like if you gradually learn how to play the deck you'll eventually dominate Nefarian. Just doesn't work. A smart Nefarian player will crush a smart Ragnaros player 80% of the time.