Just like how The Last Jedi understood the force, Kreia (and by extension KOTOR 2) has a unique viewpoint that transcends the typical Light Side/Dark Side dichotomy. It is a rare quality in the Star Wars universe to take a step back and attempt to examine the franchise's defining gauge of morality in an objective manner. Kreia is such a fascinating character because of her views on the Force.
The highlight of KOTOR 2 - and a major component of what makes the game so great - is Kreia, a mysterious force user cast out from both the Jedi and the Sith. In the exact same way fans like Fallout: New Vegas better than its predecessor, KOTOR 2 is preferable to the original thanks to its nuanced writing and compelling characters brought to the universe by Obsidian. Many would consider Knights of the Old Republic II: The Sith Lords to be the best Star Wars game ever made, despite its one glaring flaw in having a plethora of cut content. Obsidian Entertainment has a habit of being brought on to develop games in established IPs and producing the best entry in the series.