It would be beneficial that once a change form or a release form has been submitted, that the form is locked down and no additional information can be entered. This will stop the possibility of someone adding more information into the change request once it has been approved for deployment.
The other option is to allow changes to be made up until it is approved so once it has been peer reviewed or approved for implementation (workflow dependant). Once it has been approved, no fields on the form can be changed unless done by the change manager.
This has now been reviewed by the Product Management Team and will monitor the number of votes this suggestion gets with other customers.
Technically - this is possible today. To do this, simply follow these steps:
This will automatically lock your fields down (make them read only) once the approvals have been completed.