We have hundreds of repositories and adding default reviewers to every single one, or every single time when creating a new repository is a pain... Here's what I suggest.

1. Allow creating user groups dedicated as code reviewers.
2. Allow a global, project, target branch and repository setting to use a default user group of code reviewers.
   1. We use projects as brands to separate clients, thus separating development teams and following our legal process of client security by not mixing data.
3. Update the current default reviewers setting to choose 1 or multiple user groups of code reviewers.
4. The branch permissions dialog should inherit the user groups if default reviewers is selected or allow global user group.
   1. Code reviewer user groups may need to have default permission to 'merge via pull request' or at least figure out an updated UX solution for automation.

This would save so much time. Please vote!