Welcome to the roadmap version of the website. You can only intract manage account settings, or track the progress.
The layout and system will be changing. You will have the ability to make multiple worlds in one game. Multi Support will be coming to make site easier for non-English speaking users. The web design will be changed as well.
No, we will not reset the database, you you will get to keep your account. However, the chat system will be reset and old messages will be archrived.
No, we will not be deleting catalog items nor resetting Universe Coins, Account credits or Ruby Premium Balance. You get to keep all of your items you bought, earned or otherwise obtained.
This type of framework is only tempoarily will be switched back to React when the new version releases.
As of now, there is no way that username reservation is possible.
See the news about Brick Universe here.