I expect the 5 main characters to be in nearly almost every episode. I also expect this show to be long running. As such I think it seems pointless to have a latest appearance section on these 5 characters as it would be undated with every episode. I only see this tool being helpful for characters who haven't appeared in every episode.
I'm sure there is a better way to do this than to remove it from the articles, but I'm not thinking haven't it like it is now works.