Regarding Lucian,

whether you see him as a villain or not is entirely up to you. He's an extremist for sure: he originally received divinity so that he could fight the Black Ring and the Demon of Chaos.
We learned that he had victory because he approved of a weapon of mass destruction: the deathfog that nearly eradicated the entire Elvish race.
In his attempt to rid Rivellon of the 7 gods and secure the land from the threat of the void for once and for all, he has left the most heinous magisters in charge, so that every sourcerer would be hunted down and stripped of power. And from my understanding the process unfortunately leaves the victim's soul somewhere in a scattered limbo dimension.

In the end we get more ore less 2 choices: side with Lucian or fight him. Except for a few special endings (Lhose, Fane, ...?)