User/collaborator fields are kind of a hot mess. It shows 100% of all users, including deactivated users, as options to select. What is the point of user groups if we can't make this a feature to limit options based on a user group?
This would allow us to setup multiple user fields for a project and allow each team to manage their team assignments, with only a list of those options on their teams. Then using kanban or timeline view, you would be able to see only the lanes/groups of those in your team for workload balance, etc.
Currently when a user selects a user field, they see 100's of users to choose from. And even worse, in a kanban view they see lanes for all 100's of users. Not even an option to limit by only users with projects assigned. So unless you have an extremely small number of collaborators the kanban view is useless for using collaborator field.