For any given event, about 2/3 of the people will never respond to the invite, of the people who did respond it's a complete tossup who will show up, the stupid "maybe" answer which is essentially the same as not responding at all because it means "almost definitely not, but I technically could show up since I marked maybe". People often invite all their friends which includes everyone they have ever met, people that don't even live in the area or that they are close with anymore. Facebook gives you no intelligence whatsoever on the events, like "here are people you always invite" or "here are people you always invite but who never respond" etc, which would be easy to show and very helpful. There is no way to update people coming to the event on changes or anything other than posting on the event's wall, which most people will not be notified of unless they check facebook all the time, etc. etc. I could go on for so long about how shitty facebook events are, and it truly makes me sad, because really the purpose of these events is just to meet up with and have fun with friends, but the process is so frustrating I feel like it actually prevents this from happening in a lot of cases.
On that note, I am also very passively plotting out working on a better version, so if anyone is reading this and is also frustrated by facebook's crap events feel free to get in touch, hah.
So am I.
Drop a mail: [email protected]
I think you might struggle to 'bring everyone over' to a better group service. Part of the draw of facebook is that is everyone is already 'over'.