Bi-directional Data Transfer to and from Couchbase for CSV/TSV data

Cbtransfer supports CSV for ingestion but does not provide a generic input/output mechanism to/from CSV, although it does support CSVs with an ID field. The requirement we're being asked to provide is a generic data import/export tool that will ingest or export data in CSV/TSV format.
Cbcdocloader could possible provide this functionality but it only operates on JSON documents and not even a monolithic file for bulk-loading as well (i.e. a CSV converted to JSON docs and output to a large file for bulk loading into couchbase). Terabytes and petabytes are not ideal for this tool, but cbtransfer could do the job.

Requesting official support for BSON - since it's experimental as of CB 2.0
Requesting official support for JSON without document ID - since we can read JSON, it would be good to load, even if the doc ID isn't defined in the files.
Requesting official support for generic CSV/TSV import/export, but could include the ID field on export but no metadata.