true RAD friendly GUI ISP panel .... ssh-jailkit + (at least) wget , git, php
I think this may put ISPConfig several steps beyond competitors. Actually, no matter what you chose, you cannot rely on the GUI (and hence, not in an automated account creation system such as WHMCS) to have happy RAD users sign up on our ISPConfig pannels. In practice, having to setup manually from the CLI everything beyound simple ftp <-> php-website makes the Panel truly up to date...
So, same way we do have checkboxes in web site creation to manage php, perl, etc... availability, we would have to tie this with ssh + jailkit accounts.
By default, full usage of git and wget should be available, so at least, from jailkit user could push their projects into production. wget and php support would be next, so composer download to setup php frameworks could be done flawlessly.
Ideally, an automated account creation (from, lets say an WHMCS system) would end up with a system where a user could securely login to panel, setup a site and a user, ssh into its jailed environment, and, at least, clone a php project into.