Hello gtingen...
Copy Rules could be a Red Herring...
Currently - The action you press 'Create Change from Request', appears on your Request process as a Manual Action (in blue). A possible solution would be...
Create a Windowless action 'Create Change'.
Use 'Create Change from Request' as an Automatic Action (in green) thereafter.
in the Automatic action window use value types to populate from values recorded from the Requests collection - Request object.
Process illustration (Status) > [Create Change (blue action)] > [Create Change from Request (green action)] > (Status)
The Result would be...
An Analyst when pressing the action 'Create Change' would see an entry appear in the Request ticket history 'Create Change from Request'.
Press this History entry to reveal the Change (including all the value types copied as specified earlier) - further amendments can then be made to this ticket - permissions allowing.
I hope this avenue helps with your solution...