Made my own version of a Skycrag Aggro deck, with some updates after the latest tourney...
I'm not entirely sold on the idea of no Yeti in the maindeck, however; I've had success with swapping in and out Yeti... I also dislike not having Rockslide against Rakano Plate and/or the mirror match, because it's so lethal... It doesn't do alot of dmg, but being able to remove Aegis or take down two Oni Ronin's is just a great play to have against some of the aggro heavy decks.
Obliterate and Polymorph are there to take down your Sandstorm Titan and Tavrods, without sacrificing units or momentum. Chakram is just a nice play it keeps the flow moving. Being able to get it back after death is a great way to ping for dmg and not be afraid to trade if need be.
I'm still working on Sideboard, but I'm extremely liking the versatility of this deck. I felt like Skycrag Aggro fell off a little in recent meta, but with the recent changes, I feel it could scoot it's way back into Top 8 more frequently.
Uh... Snowcrust Yeti? :P
Even with Dusk Road expansion (and yes, I know this came before), Skycrag and Yeti didn't seem to get too much support. Who knows. A lot of people are building dumpster Yeti tribal decks by filling the deck with trash.