Ya know, I always wondered when it came to Heaven, Viv never went with a simple concept of it being beraucracy hell and sort of corporate in fighting. Like, you sort off have that shit with Sera, she ran this secret operation on exterminaiting sinners. Why not play up that angle as well, how there are Angels who do their job properly of guiding souls or seeing those who deserve blessing or damnation, but then there are also who take shortcuts or backstab other angels, maybe to somehow get a better rank or position so they switch documents of where souls go to hell for minor crimes (like Pentious and not telling about Jack), while say more fucked up types get into Heaven for like some favor in return or shit like that.
I think that would be far more interesting, can even explain the Heaven building located in Hell, maybe why Lucifer still keeps contact, say maybe after being cast he and God or Michael made this agreement, how Lucifer needs to check that actual fucked up types endes in Hell and how there isnt any mix up. Maybe how Adam should also been helping, how the two couldnt really work together as Lucifer eventually gave up as he fell into depression or heck maybe because of the two constantly arguing and thus nothing getting done. Maybe one argument got Adam mad enough (say bringing up Abels death), that he started telling Sera an old story how Lucifer is back on his "Im gonna overthrow Heaven and start a 2nd war" kick so Sera would allow this murder spree.