Fitting

I went with a size 2 as per my daughters bust measurements (and didn't make a muslin) but the fit is too big. The neck and arms are good. The bust isn't nor is the mid back, they are too big in relation to the waist. She is thicker waisted. The waist sits firm but not tight at all. Hips are fine. How should I redeem the dress as she does really like it and has already cut out one to make herself. I am going to attempt to add the photos I took last night. Sorry they aren't the best. Ps she is 5'5"