Well I just installed it - Haven't played with the CMS much but I have two recommendations.
1. A more graphic installer, "noob" users don't particularly like having to edit PHP files to install a CMS.
2. A huge no-no is to allow the CMS to fully operate with the install.php file still active. If someone installs the CMS, gets everything working fine, has hundreds of users register - then someone comes along and sniffs the directory and sees install.php is still there - all they have to do is run install.php and the entire website is wiped out. A simple
PHP Code:
if(file_exists("install.php") die("Delete install.php");
would do the trick. I'll let you know more when I play with it some more.