Warmaisach
Abbadon plans to destroy everything, and then rebuild it, to learn the 6th concepts of life and death...Lucius could have done the same, but in the new world he made sure that the people he knew were reborn, including him. So, a second lucius was born and became God, but this one failed to connect with the abominations like Shang.This would explain the 2 Lucius
When Alex asked the question he most likely imagined his future to be like one of those cultivation MC's where he would had been strong but kind as well, with a beautiful wife or even harem by his side and with many friends he cherishes. He would remember his 9th question and fondly look back at his "kind benefactor" god that gave him this 2nd opportunity in life in a magical world that allowed him to become so strong and get everything he ever wished for. God and Warmaciah looked at this cliche plot and went "NOPE!"
Split personality makes a lot of sense. I remember gregorio saying that Lucius would make incredibly rash and irrational statements or go on massacres and then regret it the next day. One such decision was the elimination of the paths. If good Lucius was split and killed by insane Lucius it makes sense to me, since it was already stated Shang could remove his humanity. What could stop one from removing a personality? Or maybe there were 2 souls.