Re: you comments on the artwork/childish thing, if I may add my opinion, personally it's one of the things I like about the game. I like that it's kinda sweet and innocent with funny faced goblins making silly noises and fairies battling dragons.
(Although have a look at the news section, have you seen the pictures of the new decks, I think you'll find they'd scare the bejesus out of most kids )
As a female player, I get sick to death of games artists who design graphics of (for example) a fairy, then stick a GIANT pair of plastic t!ts on it and add a sexual element. There's enough of that crap in other games and real life IMO.
I hope I understood your point correctly here.
Another way we can help the guys is of course to remember to leave an app store comment and rating.