Well, if you'd like some realism...
Sometimes it happens that the next group that goes in has very little idea about what happened to the ones that went in before them save for "They went there before you." Maybe the same goes for the daimons? The Elders might have gone to Daimon group A and said "Go to the human world." Group A loses contact with the Netherworld Elders, so they tell group B "Group A disappeared. You're up next. Go."
I am pretty sure this stuff happens in real life more often that we might want to believe. For example, when I took over the duties of my predecessor at work, I was told what I had to do but nothing about what went on before that.
Another take on it is maybe the daimons don't care about humans at all and would give about as much thought to their actions against them as a human would to the many bacteria they kill by washing their hands.
Your attempts to banalize and justify the phenomenon greatly irritate me. You are justifying the unjustifiable. And your suggestion is completely absurd and non-feasible: contact with netherworld was always RPed as maintained on BT, and it would have caused a reaction between the original and the new group anyways, more than just a transfer of the titles to the more active daimon leaders (while the others are there and passively pass it on).
We aren't talking about about some small office where the boss leaves for the summer. We are talking about freakin' daimons, undeas. Immortals beings from extremely disciplined societies. Usually, it's not just new chars replacing the old, it's the same character having simply forgotten everything that happened.
Your suggestions just go completely against set and following RP. This isn't about some office worker getting replaced and it's nothing like a realm just electing a new ruler.
