C'Thun priest is indeed boring (and bad, and disappointing) but I'm having lots of fun with that dragon list:
It's heavily inspired from
that one.
Forbidden Shaping is really the card that makes the deck. I never mulligan for it but it's great to plug holes in the curve against aggro and to generate late game threats against slower decks.
8 mana shaping is awesome: Tirion! Grommash! Rhonin! Ragnaroses!
I've dropped Nefarian for Chillmaw because of aggro and patrons. And I've decided that since I had Shaping as an insurance for the early game I could be super greedy and have 2 entombs to outcontrol control decks. Also, I had to include Harrison because Doomhammer belongs in a museum.
Some of these choices might be bad but they have been working well for me so far, especially against shamans and zoolocks. And there are a lot of them.