I agree that the art is better in terms of making Kara look more "real" but I really don't like the style. There's a lot of inconsitency in some panels. I don't think Kara looks fat as some idiots claim but I do think that the way her costume is drawn looks odd. Like she's still growing into it. Frumpy, almost.
I think there has got to be some sort of happy middle between the insectoid "naughty cheerleader" of Churchhill and the "Hayden Panettiere in what she wears on laundry day" look of Guedes.
Story-wise - well, I'm waiting until after Amazons Attack and the tie-ins are over to pass judgement. I'm not normally a fan of Bedard's work, but I have enjoyed what he's done with Black Canary in her mini-series. I'm not impressed with his take on Kara as a character so far though and agree that she does seem to have regressed somewhat into "shiny, happy, perfect daughter". I'm hoping that's just because - going along with the story so far - she is trying to plead for peace in a desperate situation and is trying to keep her friends among the Amazons from getting killed.