A fourth Demon race for yet another playstyle... (vote)
Ethereal - a ghost/banshee type race. This character is "Perma Death", as well as FFA PvP. Anyone familiar with Diablo or Path of Exile knows how much drama and heart ache can be created by allowing this type of character to exist.
It's racial abilities can be focused on defensive utility, things like Vanish, smoke bomb, escape artist, phase shift, etc. An ethereal could be a very hard character to lock down, which would make killing one that much more rewarding.
Also gives Fractured some new territory, because correct me if I'm wrong, but I don't think any mmo has ever had a ghost race? Dark Age of Camelot had banshees but they were sort of undead elves?