BG3 had some twists like that. Esther -> Evil hag, Guardian -> manipulator, Lazael development, Nine fingers guild. But there can more, and more layered.
I know of no way to make Laezel turn good.
She at best switches from one evil master to another.
She does open diplomatic talks with the leader of the Githzerai. Diverting from the Githyanki bellicose culture of conquest and tyranny to one of culture and wisdom.
