I have many tags. When they list down the sidebar, being able to fill the column will help me reuse tags rather than invent new ones. Tags are like hashtags in my vault.
A filter feature would also help me find malformed tags that need to be cleaned up. I could look up something that doesn’t seem right and then correct it by drilling down the tag name.
If you’re requesting a feature, we have a forum category for that. In fact, there already a request for this there! You can upvote by pressing the heart button, or by commenting if you have something new to add to the discussion.