Hmmm, Luke died by projecting himself in some other planet.I guess but the difference there is that Hux is a pleb and Rey is a very strong force user her self.
I personally take some form of exception to both Snoke’s and Luke’s remote use of the force. Especially the combination of both. If Jedi/Sith could project themselves in any location many planets afar, while having full sensory input from their new surrounding and full use of their powers to boot, why the feck ever travel. Why put your physical body at risk in missions. It’s fairly lore breaking if you consider it.
I think that Snoke is dead dead. Unless they go full Star Wars: The Old Republic (no-one should ever go full SW:TOR), he is dead. The entire point of his killing was to establish Kylo as the main antagonist, to put him in the unknown and to surprise us. The thing I am most excited for the next movie is that I have no idea what is going to happen. If they return Snoke, it would be a bad move IMO.