Newbie but..
...just registered and had to post to this.
I must admit I was a bit taken aback by the first photo I saw of Georgie. I think all of us who objected so strongly to the Lucy in the old BBC version were desperate to see the Lucy in our heads put onto the screen, and it was startling to see that little impish face in the picture. But ultimately, in a film where your main characters are kids, you have to base your casting decisions on whether they can ACT, because if they can't, no amount of type casting is going to make it a great film, just an annoying one (re: anything with the Oleson twins). So I consoled myself with the assumption that Georgie must have gotten the role on talent, which actually made me feel better about the films in general. Obviously they were taking them seriously.
Now, having seen other screenshots and a very bad-resolution version of the trailer (a curse upon dialup), I have no worries. What an absolute doll she is. Cute as they come. Whoever said she was dumpy has been watching too many American tween dramas in which 24-year-olds play high schoolers, and fourteen-year-olds play children supposedly under ten. Little kids have round cheeks. Get over it, or get over your own anorexia.
And good point about the fact that she is not supposed to be drop-dead pretty, so as to play up the Susan-envy factor.
Even the bad-res trailer gave me goosebumps. MAN am I excited!