Valve announced a replacement feature for both Family Sharing and Family View. Currently in beta.
Features:
- up to 5 members
- game sharing
- parental controls
- allow access to appropriate games
- restrict access to the Steam Store, Community or Friends Chat
- set playtime limits (hourly/daily)
- view playtime reports
- approve or deny requests from child accounts for additional playtime or feature access (temporary or permanent)
- recover a child’s account if they lost their password
- child purchase requests
Doesn’t the offline mode solve this?
Only the parent can play while being online. Their two kids must be logged in.
Achievements don’t track in offline mode, so not a perfect solution.