Doll dress with sleeve

Adding a sleeve to a pattern designed to fit a dress for a 15 " doll with no sleeve is a pain in the butt. This was my practice for the Elsa dress: I promised to make a matching Elsa dress set for Bella and her doll.  I think I am making progress with the sleeve:

The other sleeve was a bit messy, though and it's too tight in the back. Now I know to make the back even longer. 

 

Dolly has a new blue satin-y dress.   Cotton is so much easier to sew, but it doesn't shimmer like this!