The addition of sub categories

I know this sounds like an odd thing to want when threads exist but threads are difficult to use, messy and most bots can't be used in them. Whilst sub categories would be a lot easier to use and find, you could use bots in them and they would look a lot neater for example you could have: Category: recipes. Sub category: European recipes, Channel: Spanish recipes. Which would look a lot neater and be easier to find.