To dormer or not to dormer that is the question!

A small town, a view of the river and no bathroom window with a sloped ceiling. This will be a rental property but adding dormers would just make the house so much more open feeling and open up this view of the river. It's on the Main Street of a small town. I don't intend to sell for a long long time but would dormers really add to its resale value years from now? There is a lot to do even without the dormers. It's a duplex.