Traffic is falling from Bing. I have plenty of contents and they all are good and much appreciated by the audience. What to do?
Try to get as much as relevant high authority links to those content pages.
Its not all about good content. Its also about content flow you must have a good content flow in a steady rate. If the search engines think that your blog is dead one then it will disappear from the SERP's sooner or later.
Try to get exposure in the social channels also. They might not effect directly but although they can give your content a boost.