both fix & edit & add many important things and so far I see no problems with Immersive Lichdom added in Early SPM 5 Alpha but not sure about classical lichdom yet.
Note: They work great along side "Tainted Blood of the Dragonborn" which will then allow you to be a Lich | Vampire | Werewolf with no problems I can yet see and have all experiences at the same time with the same character and truly role play as a hybrid :D :D
Immersive Lichdom Link: https://www.nexusmods.com/skyrim/mods/60783
Classical Lichdom Link: https://www.nexusmods.com/skyrim/mods/84937/?