jBPM provide more than one editor for modeling process:
- Eclipse editor that is very simple
- new eclipse editor that is being created to support the full BPMN 2.0 specification. It is currently still under development but can already be used to create executable BPMN2 processes
- Oryx Web designer, another editor that support full BPMN 2.0 specification and it's integrate in guvnor.
Sure i think that neither of editors is comfortable, but i think that is sufficent to claim process modeling confomance.