Currently for an 'Out of Date' process:
If no changes are required, the Process owner/expert will go into their "My Reviews" page, click "Reviewed It" and provide a comment like "No changes required".
If changes are required, the Process owner/expert will go into the process, make the necessary changes and get it published. However this still required the Process owner/expert to go back into "My Reviews", click "Reviewed It" and provide a comment (which will be the same comment as the comment left for submit for approval).
Suggestion would be to:
a.) make the review date be (re)calculated from the latest publish date
b.) have the 'Out of Date' process disappear once changes have been made and published (I guess this would happen if a. has been implemented)
I do agree though that it seems onerous for Process Owners and Experts to have maps they've updated in the last 12 months still appear as requiring review.
It seems like we can auto push the review date back another x (default value set) months by having 'Explicit Reviews' turned OFF in Admin > Configure > Process Editting > Enable explicit process reviews (Default: On) > OFF
I had no idea until recently.