1. My first suggestion is being able to change usernames. I think that's a very important part of a forum.
2. More metals. There doesn't seem to be a page where a list of the metals can be seen. Also, being able to see the metals on a user's profile would be nice as well. Last suggestion for the metals is having a metal for being a moderator.
3. Some better userbars would be nice. The only cool one is the Waifu one, and that's only cool because it's a different color. Even the admin userbar is bland and boring, it's on par with the default one.
4. More groups! There's only Waifu currently, I hope a gaming related one can be implemented in the future.