role configuration about rights to modify end user data

Sadly currently there are only three options available of which none really meets our requiries.... 

The currently available options are: 

- Read only 

- Add and edit within their organization 

- Add, edit and delete for all end users 

Our set up and processes would require to be able to add and edit end users not belonging to the same organization as our agents but not providing the right to delete end users. So the rights that would  meet our requiries would be somethin like: 

- Add and edit for all end users 

Would appreciate whether the ZenDesk developers might make that option available as well. 

Best regards.