I would not worry too much if the posts have 400+ words.
Also, I see that the links are all category and archive links. These should be ok as long as you are using a plugin like the "All in One SEO Pack" in Wordpress and set NOINDEX on categories, archives and tags.
Also, you can set the categories to be displayed as a dropdown which would make the links invisible to the crawler (if I am not mistaken). A drop down category list may not look good but if the links are seen as links then it should help.