These guys have been doing awesome work, growing this into the largest Hearthstone group on Google+! Please take some time to congratulate them, thank them, and tell them about your favorite gold card :)
There are many card games that don't actually do balanced odds for their options (Hex being the one I'm most familiar with). I absolutely think it's worth testing Hearthstone cards. At least one bug has already been found regarding odds in Hearthstone cards too, which the devs fixed after the community showed them proof.
I'm a game designer on EverQuest at Sony Online Entertainment. I write about MMOs, MOBAs, and other games for PC Gamer and other sites. I play videogames, like people, and someday hope to make things out of wood.