Since OS X 10.7/10.8 there has been a know bug in the Quartz Composer API that mean the stock line patch will not render in any other apps except the Quartz Editor.
This means that the stock line patch cannot be used in VDMX.
This forum is currently one of the more active communities that use Quartz Composer in their work so maybe if everyone was to file a bug report with Apple it could possibly encourage them to fix it.
The chances might be slim but if enough people shout loud enough they may take notice.
I encourage every member of the forum to file a bug report on the Apple Bug Reporter
You will need a Apple Developer account but most people should have one from when they downloaded Quartz Composer. A free developer account will work.
https://bugreport.apple.com/