Ability to update value of Reference field for a data deployment
"Select reference fields to deploy"
Ability to edit the value for the target deployment data for the reference field instead of searching for the match on the Target.
Ex. Loading Opportunities from a Source to a Target that contains 5 different record types, but when uploaded to the Target we specify the recordtypeid to one that matches a recordtypeid on the Target for the entire data load.
Similar to how the Owner reference can ignore the Target's users and default to the running user of the data deployment.