Show parent category/only published plans, plus archive subscription plans

• When I use the filter feature to select a category with subcategories, it doesn't display the subcategories, only the main category, in which there is nothing. I'd like to be able to display subcategories within a category to view those plans.
• When I edit a subscription plan and then return to the menu, I have to re-select the filter to show published plans. This turns into a lot of extra work when I'm working on new plans, and I'd like to be able to display only certain plans (published/in a specific category) and for it to stay that way until I change it.
• Because I have at least 15 plans per year for classes which are new and then I unpublish them and I won't need them any more, I'd like to archive these. I use them so I have statistics for my business, however I don't need to keep them available at all times.

When I use the filter feature to select a category with subcategories, it doesn't display the subcategories, only the main category, in which there is nothing. I'd like to be able to display subcategories within a category to view those plans.