List of third party plugins and behaviors
The plugin Call JS by Joe7 sounds like a real integration of javascript calls.
And also like Ashley said, the SDK allows you to make your own custom plugin/behavior to really fit your needs.
I think it's quite a powerful combination that does not remove
"> No support for external import of JS code (Uncertain of this one, please correct me if it does)"
But surely removes
"> No support for scripting. (Would be awesome but the event system served me more than well till now)."
Also
No built-in support for version control, team work.
The use of version repository (svn) is totaly doable since the projects are in XML format (when saved as project folder).
There isn't indeed an option "load from repository" in C2 but is that truely necessary ? (honest question, I haven't worked in team using this method).