Currently, a user is able to add anyone on Bitbucket to Users at "User and group access" on repository settings, which can cause an unexpected change.
Give an option to Team account which can avoid an accidental change such as:
- a config to restrict adding a non-Team member to Users access
- a config to enforce specifying access only by Group
Do not to give admin access to an uncontrollable number of people in your team, and make sure to specify access by Team group.
Besides, consider adding yourself as a watcher to be kept informed as to the state of this feature request moving forward. With that way, if our development team updates the ticket, you'll be notified via email.
At the moment, we can't set an ETA for this feature to be released, since there's a number of factors that determine how our product team prioritizes new features.
You can learn more by reading Implementation of New Features Policy.