Admin, Playmage.
Have you considered having an events switch? At this point in time the only random/popup event you really have is the Raid Boss. For instance, on weekends when I'm not really paying attention to chapters, materials etc, I'd be nice to turn off the Raid Boss popup. Another example is when I already have a 7* Raid Boss card, and I'm not really interested in leveling up its skill, having the popup does me no justice.
So for me, I'd turn them off on weekends, or turn them off when I have finished grinding them. Not sure if it bothers other people, but it is a small waste of time. :p