The Version Control process should allow the reviewer a direct way to view the actions inside the process
The reviewer should be presented with an easy way to review not only the functionality of a process, but the actual "code" (the actions in the process). The reviewer's job may often include looking for problems in the "code". Thanks.
The reviewer in this case would be a user with access to the Control Desk. The process and its code is visible through the Process Studio only and you could modify the role of the user to have access to that component as well.