There should be an option to invite different sets of people to different subevents. In most weddings, guests are not invited to all events. For eg. Some guests like office colleagues and acquaintances are invited only to Reception and Wedding while the close friends and family are invited to all functions. Another eg is when Boys and Girl side have separate functions. The photos should not be visible to guests if they are not invited to a subevent. The event reminders should not go to guests if they are not part of that subevent. Their Digital invite should not show those functions. Events with Sub-event guest sorting should either have different digital invites too.