I love it as it is, and think it is a great wallhanging.
I don't know how picky you are about colors being a good match or compliment. I am picky! If you are picky I would be afraid anything you add will make you a little ticked off in the end. You might always look at it and think, "I don't like how that doesn't match..."
Only you can answer that!! Good luck whatever you decide. It is very pretty now!