The new skillset seems powerful, his new ultimate is just out of the world and I love it but I'm going to miss repaing and enslaving the sould of fed ADCs and Yi.
I see he has a pull, I wouldn't have given him CCs, I would have made him unaffected by CCs (or a really reduced effect) but I will wait to see his entire kit before judging.
And last but not least...
#**_Please Art Team give him RED EYES_**.
Unless something major to his lore happened too, him not being similar to the other SI ghosts and undeads is a major part of his core as a character and his red eyes full of malice are a distinctive trait that gets openly mentioned in his background.