There are few items could be (cumulatively) implemented:
1) Since the PanDA plugin was created, iDDS was updating the API, the current becomes outdated. We should update the API calls
2) iDDS now supporting propagation of the IAM authorization information into the workflow. The way of authentication and using PanDA as authorization proxy should be updated.
3) The workflows with very large tasks (60k) jobs creates large memory footprints in the iDDS server, it would be more efficient if they get split into few less chunks of less size.