For a more up-to-date and specific todo list, check here:
http://www.web-cp.net/mantis/ for all bugs filed in the "Features" category.
All CP's
- Add detailed stats (awstats or webalizer)
Personal CP
Domain CP
- Complete DB management (add/remove databases)
- Password protect directories
- Custom Email Settings
- User Mailing List
Server CP
Server Backend
- replace mod_watch by mod_accounting
- harden functions with user-level permission checks