'mail server' -> 'domain list' needs to be tweaked as it is very slow on populating what is set up and what isnt; i have seen it show the wrong details for domains that are set up correctly and it takes a few minutes of re-clicking to fix that view correctly.
Database Manager should automagically log you into the respective website database, otherwise you may as well just have one clicky as they all do the same at the moment, that is its just a link phpmyadmin and thats all it does.
Been a month since the sieve request, this really needs to get addressed with regards to dovecot pigeonhole support of sieve package addon. Spam assassin on its own is not enough.. need sieve to learn spam and ham and move the crap to the spam folder automagically.
web stats: webalizer or awstats.. we need one of these or both, or something that can show us statistics on web traffic.