Suggestions:

• provide --keep-input-data option,
• replace --chunks-dir option with --work-dir, because it's also used for non partitioned data, and remove default value so that the user is aware where data are stored.
• in cfg files part.id and dirColName seems to have the same semantics: double check and if yes, use only one parameter.
• comment each field in an example cfg file and explain what is required by partitioner, duplicator, css or other loader components.