This is a great idea. Thought probably not exactly what you are looking
for is that you can create segments through the API. There is a JSON
(JavaScript Object Notation) version of the segment. This could be used
to create a bunch of similar segments very quickly. You can make
requests quickly through the API explorer
(https://marketing.adobe.com/developer/api-explorer#Segments.Save ).
Like I said it isn't quite what you are suggesting but it might let you
do what you need.
Great Idea. Right now users can only share with other users where as
admins can with other users, groups and the entire company. Does this
meet the need? Or is the ask to disable sharing completely for certain
users?