WebAPI Limitiation; RetrieveAuditDetailsResponse ComplexType doesn't return NewValue and OldValue structures

Hey all!

The RetrieveAuditDetails WebAPI Function (and more specifically: The RetrieveAuditDetailsResponse ComplexType) doesn't return NewValue and OldValue structures.

Therefore, the RetrieveAuditDetails Function does not provide a viable alternative to the RetrieveAuditDetailsRequest provided by the OrganizationService.

My question: 
When (with which WebAPI version) will the WebAPI reach full parity with the OrganizationService in that regard?

Thanks and kind regards!
Daniel