I'm not sure if I'm doing something wrong but I'm assuming I'm not so here is my small suggestions. xenForo lets you set moderators to certain forums if you don't want them to be super mods. However, what do you do when you want a moderator for an entire category? It's tedious to set a moderator for multiple forums under the category, especially if you have a lot of forums in it. It would be best if you could simply set a moderator to a category and have their moderation permissions recourse to every forum and subforum under that certain category.