This topic is likely been repeated a couple times in the thread but I do agree that its weird to base a show about Heaven and Hell, but not have the typical top characters in it. If there was nobody having the names of them or the show is based only in Hell, then you have a lot of leeway, but Lucifer and Heaven exists. So that means God exists. You can't have one or the other, unless Lucifer is in Heaven instead since that is before the downfall. Then Viv fucked herself off that too, because Peter existing, means Jesus exists. And Jesus existing means God exists.
And then you have the S1 villain be Adam. The other seasons wouldn't exist after his death because Heaven now has a big reason to annihilate Hell. Adam fits as the second-to-last or last season villain, not the first.
Its possible to have the big top characters be simply background or non-important characters that are interacted every once in a while, but when Adam met Lucifer and then is killed, all bets are off.
I'm know I'm screaming into the void since everyone can do their spin of biblical motifs but the hierarchy is already baked into it. Viv breaks it completely to think shes smart but nothing makes sense and nothing is consistent because its obvious she barely put any thoughts on it other than that.