Must: Links & related details access / visibility refinement if needed
Must: Manage edit translation form instead edit according to access
Must: Improve doc and / or manage strange use cases (like not having same langcode for main entity & related translation)
Could: Extend to other field types extending from current supported?
Could: Improve preview: example use media library display for that type when possible?
Could: Possibility to enable just into specific entities / fields? In that case with update to enable to all entitities & fields to preserve current behaviour
Could: Possibility other modules to alter behaviour / result (without overriding service)?