Lack of traffic may not have anything to do with the content of the Editor's Choice hub, so editing it may not be enough. My strategy will be to promote those hubs on my blog, my Twitter account and on Facebook to get new views from outside the Hub community. If there are interesting pictures, you can try to pin one of them to Pinterest.
I'm not sure if any of this will work. Just some thoughts to consider. Best of luck and congratulations on earning an Editor's Choice on your hub.