Staff do monitor these threads and I'm sure they will read our feedback and make adjustments. Wordpress.com is to a large degree a beta testing community. Features are unrolled and bloggers test them, share their experiences and suggestions for improvement and then staff take that into consideration and make adjustments.
This tagging is a new feature. It is meant to complement and enhance categories and not to replace them. That's why I think we ought to encourage anyone with feedback to share to post it here in the forum and to think positively. After all, the only constant in our world is change. :)