Is there an option in CORE to upload a batch job instead of the individual ADS uploads that have the 200 rows?
Your only option for uploading a spreadsheet is via the ADS process. The ADS process actually creates a batch job that submits your spreadsheet.
There are agencies that submit text files containing their documents via the CORE secure servers. These are automated interfaces that load during the CORE nightly cycle. This option is only available via a change order and a CORE Governance Committee (CGC) request.