As far as I can see, this module doesn't allow sub-admins to block or unblock users, without allowing them to edit the users.
It would be good to allow that as a separate permission.
1. create a role with the permissions from this module, without assigning Edit users with allowed roles
2. log in as a user with that role
3. from admin/people, select a user
4. select Block the selected user(s) and apply
No access to execute Block the selected user(s) on the User myusername.
Add a new permission for blocking and unblocking
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
I can see this could be useful in some cases. However another site might wish for a different variation - to edit only another field. This seems to be about field permissions and there is already a module for that https://www.drupal.org/project/field_permissions → . Or you can write a simple field access hook.
I feel this module is mostly about entity access, not field access. Already this module creates 4 permissions per role, and I feel that's enough.