Output components can't return fields value which are different from Input schema

https://jira.talendforge.org/browse/TUP-4491
As a example:
The runtime part when tSalesforceOutput schema is different with input schema.
When "ACTION" is insert, "EXTENDINSERT" is unchecked, "RETREIVE_INSERT_ID" true.
The output schema would add "salesforce_id" to return the Id of the record, when the data is inserted successfully.

But with current design, except use globalMap to save this vlaue, I can't find other way to return this value.
and I think use globalMap is not a good and generic way