Please can you give us the option to create a bank of tags that users can further use to categorise their posts? Can you also allow admins to edit these tags (colours, removing duplicates and similar tags etc.)
For example, suppose we have a Space called Music. In this Space, we might have different categories (e.g. Music Theory, Music Suggestions etc.). Inside the Music Suggestions, it would be great to tag each post by genre (Jazz, Hip Hop, Rock etc.)
I reckon this could give us a lot more granular control over our communities! It would also allow users to easily search for posts in seemingly unrelated categories/spaces.