The Sith were named in the ANH novelization way back in the day, and I believe that we do have physical evidence that the Sith were always going to be the opposing order to the Jedi in the older drafts, like as "Sith Knights."
Wookiepedia lists Snoke as the leader of the Knights of Ren, though that may just be recognizing who their boss is. The fact he states he can train Kylo implies he's probably done so for other characters. The source book does mention that Snoke is apparently paranoid enough to remain in a mobile command post, which is a change up from Paplatine they should embrace; he's someone who's actually scared of his enemies.
And again, I'd love them to emphasize if he's more of a manipulator than a mastermind; Palpatine was all about controlling the chess board and all the pieces, but he also had enough charisma, charm and skill to get Anakin to act as his second even when Anakin k ew he was being played, and his whole image in the Empire was supposed to be that of a kindly, benevolent dictator. Snoke, on the other hand, could be a guy who depends more upon direct manipulation and if found out could be in trouble. Everything about the First Order and the Knights of Ren looks like a more controllable and polished version of the Empire. Maybe he made it that way because he knows he can't defeat a more experienced and orthodox Imperial military dictatorship, or Kylo could kill him if he actually completes training.