Okay, so I have a few questions.

I am in the process of making my daughter (age 6) a new dress using Elizabeth's dress pattern. The dress is made from tropical weight wool, with a smooth bodice, jewel neckline, and bishop sleeves.
I made a mock-up out of muslin and it fit her fine. Now that I have the bodice complete, the back seems a bit big/baggy from below the shoulder blades through the small of the back, to the bottom of the back of the bodice.
The bodice lays nicely/flat at the neckline, across the back of the shoulders through the shoulder blades, at the arms-eyes, and at the front of the bodice.
So what should I do?
1.) Gather the bodice into the skirt? (I didn't plan to use a waistband)
2.) Can I dart the bodice?
3.) Should I leave it alone?
Any and all help is greatly appreciated.
Bob