I would like to suggest some new tags-
Homepage- a homepage for a challenge or collaboration, or a group.
Hub- A page for various links. for challenges.

And a new function-
Polls- appear at the top of the page, for voting for challenges etc, or choosing a suggested build. They could also be used by posts like this to find out people's views. They would help people like SR build planes people want, not just what they think they want.

Thanks for you time, and considering these proposals. It would be great if they could be added! Please upvote if you agree and want these.