As a feature to enhance data deployments, make them invocable by Salesforce APEX (or other tooling) whenever a Sandbox is refreshed. Salesforce has a configuration to let the user specify an APEX trigger/class to run upon Sandbox creation. That could call the data deployments to run on the freshly minted sandbox, seeding it with data. This would enhance automation.

There are tools out there (like SFApex) that do something similar.