It is hard to comment on design without seeing the fabric. However my gut is telling me that you should reconsider your setting triangles. I know what you mean by looks "chunky" but these are the ugly ducklings that turn into swans with quilting. I think more than one color will compete with the stars which are the focus of this quilt. A blue triangle with white quilted feathers may be the icing on the cake. I have only recently come to realize that the plain looking chunky parts are the background for quilt work.
Rita