I'm not sure on the exact situation to the original question, but having trunk won't just make things easier to impliment.
Expanding on what TPC said, trunk has meant that eA don't really test their scripts any more. They convert it, and upload it, fix any big errors that the server catches on uploading, while the server can fix any small ones, like ;s missing.
(If I am understanding this right. I just fix the eA scripts.

)
However, the downside to this means that entire lines of scipt that are missing, or numbers that are wrong are not caught in either the upload, or the testing, as there really isn't any testing.
So, Trunk can have a lot of bugs and bugfixes.
*reapply intimiate knowledge of the Sign Quest here, aswell*