I'm launching a short-term beta that all users can participate in! The update will be largely focused on making renshuu more fun for users and a better source of motivation. As is noted on the beta page (under the Help menu), this will be focused on reworking:
1. The dashboard (the page you hit when you log in)
2. The schedule summary
3. The quiz finish page
Within #1 will be some daily challenges for all users.
The quiz system will not change much, if at all.
If you're interested in jumping in, just go to the beta link in the help menu and click the button! There is nothing new yet (as of the writing of this message), but things will start changing soon!