[Death by Mirrors]

Women shirts in general tend to show a lot of cleavage anyway, as opposed to men shirts. You might be able to alleviate that with a custom lacing, depending on your figure and clothing style. Or a dart in the back will also raise the neckline.

For skirts that are too short, try adding some similar fabric in a contrasting color.

No idea on the big boobs or wide hips however, aside from completely sewing your own wardrobe.