@maciej I see many problems in eclipse editor. I suggest it's time to sync the eclipse editor with latest updates to guvnor.
I noticed the following issues:
1. the process model in eclipse designer is .bpmn while in guvnor it is .bpmn2
2. submitting a bpmn2 model using eclipse would change the task varialbe types from defined to undefined.
3. the above mentioned .ftl issue.
Currently I gave up using eclipse designer since there are many issues.