Hi Patricia,
I am not familiar with BPMN2. And I don't know much about business task. If you could show me more details about it. I think we have a chance to achieve it in the future version.
BTW, we do want to continue developing on BPMN2, but I don't see any plan for this. It will be very apprieciated for us if you could show us some advices. Thank you very much.