TSLRCM tries to fix to the best of our abilities the issues The Sith Lords had due to being rushed. Containing a host of restored content and fixes many bugs left inside TSL giving you the most polished and best possible chance to get the full experience.
Yay! Doesn't kill him, just gives you a few dark side points though. To kill him, you have to view other mods.
(The option was always there, but the script checked for the wrong file *sigh*. Did improve animations a bit, like the hand to chest (designer wanted throat, but there is no such animation :() added there)