Today we added a new attribute in the changes web service so that you can get more indication of the criticality of a particular change to your network perimeter environment.
The docs update will be published detailing this shortly at http://aka.ms/ipurlws
You can see changes with the new "impact" attribute here:
https://endpoints.office.com/changes/worldwide/2018102900?clientrequestid=b10c5ed1-bad1-445f-b386-b9...
Regards,
Paul
