In my opinion, you still need to quilt the border. Although the width of the border would be fine in terms of quilting lines, I would not want to leave the long length of the border unquilted.
I love your curved quilting lines in the body! Could you skip the dark border and extend them through the green border? You could also simply do a curvy line all through the green border, encircling the quilt.
I wouldn't add prairie points. Love the central focus and, for me, adding prairie points would draw the eye away from that marvelous center!