I don't care about scheduled events at all (the only thing to really schedule is Coil, and I gave up being a raider. I'm one of those..."if me making a mistake can wipe the whole party, I'm a panicky trainwreck" kind of people) but I think an active FC is one that talks regularly throughout the day (not silent for hours on end, or only talking to do an instance) and does stuff together - whether it's grouping up for hunts, doing instances, having weird underwear dance parties in Mor Dhona...