Tobias knows how beloved Copia is, and how important he is to so many fans. So what if he retires him from performing, but not from the role as Papa?
Popia can stay at the Ministry and run things from there. He can still be in the Chapters videos. We can be content seeing him once in a while and knowing he's okay.
So who will front the band?
Imagine this:
A Chapter entitled: Casting Call
Papa, Sister Imperator, Saltarian, and spectral Papa Nihil hold auditions for the next lead singer of Ghost. (Hell, have some Ghoouls there in the background as well - they should get a say.)
Siblings and clergy members from different branches come and give it their best shot. Could be a very interesting roster of potentials. Mary Goore? Resurrected Terzo in disguise? Unmasked Phil? I'm sure Tobias has a TON of silly characters taking up space in his brain.
I don't know where this idea came from, but it's taken root in my mind. I could be really cute/funny/clever if done right. And could be a compelling way to introduce the new singer...
to think that nanako asking geto who gojo satoru is even promoting him to answer about gojo's strength, and yet even after years after they separated, geto still was the only one who doesn't see/define satoru solely for his strength, but as his best friend (the only one he's had)
bonus:
imagine miminana being fine with letting things be despite satoru killing suguru. usually getting killed by someone whom you love is seen as betrayal, and yet miminana doesn't see it what way. the way i see it, they know how suguru loves satoru and suguru wouldn't have it any other way (dying by satoru's hand)