If I'm part of two calendars, I should be able to set separate availability in my profile for each calendar.
Use case: I have a calendar for new clients which accepts appointments only during specific blocks (mornings, for instance), and then a second calendar for existing clients and internal meetings which can book for the afternoons only.
Instead of having a single availability in my profile, each calendar my profile is connected to should bring up another set of options to schedule to a specific calendar, check specific calendars for conflicts, and set certain days/times for scheduling availability.