Free Busy should show different color/pattern when the recipient is the organizer.
It's hard to find times that work for most people when creating a meeting. Often times, there are just one or two people who show Busy for a timeslot when everyone else is free. Those busy blocks, however, may be with appointments for which the recipient is the organizer and has the power to change. It would be helpful then to display a different pattern in Scheduling Assistant for blocks that are Busy but where the recipient is the organizer and not an attendee (and therefore may have more leeway to work around).