Intake does not support changes to existing evidence held

When an application is completed online (or even internally), once submitted, an AC is created and all the info inserted as new evidence records which then remain in an 'in edit' state until the application is authorised. This process works fine for brand new applications but not for scenarios where customers are already registered on the system.
E.g.
Create a new application online and as part of that process, pre-populate it with existing information we have on the client e.g. gender, dob, address, income etc. Pre-populating allows caseworkers to verify if the information we have already is valid or is still correct. Let�s say the client decides to change their gender - they can change the details in place. On the script, we may also ask, 'From what date did your gender change?'
When this application is submitted, this change to existing information isn't supported - all information from an intake script gets mapped to evidence on a newly created application case. The evidence remains in edit - as the evidence is an insert, there can be no 'effective date of change' captured as there is no record to succeed it.
This is a problem for customers because the caseworkers can't even update this.
Impact: Once the application case is authorised, the evidence will get shared onto a case - the gender in this case, is shared to the person record and because it doesn't have an 'effective date of change', the incoming evidence will be handled as a correction. For the caseworker, when they view the gender record, they would have the history showing the previous gender but the change that occurred would be a correction to the original value - this means that any info on when this occurred from is lost.