The writers seemed to not have read up on or seem to care about established lore from the prior games. Larian just seems to have given them names people recognize, and said write something around that. I said to my friend we could have had two other ways for Original Sin 2 to be its own game but also keep in with the established lore. One - It could have been set after Lucian became the Divine and we could have been Soldiers for him during the Great War against the Black Ring and it leads into Lucian being "killed". Second - It could have been set after Damian "killed" Lucian, and maybe we could have been apart of the newly founded Slayers and hunt down the Dragon Knights to avenge Lucian and that in turn would have lead into Divinity 2. I know I'm complaining a lot, the game itself is good, but the blatant disregard of the established lore irks me.
I'm sad to hear they diverged so far away from the established lore. I think the basic lore was pretty good, and interesting. They could have at least kept the basic aspects of established lore. I think they should have given it a different name, Original Sin 2 makes it sound like a sequel to the first.
I feel bad complaining, because I love Larian and their games. But at the same time, lore is really important to me.