I agree.
As for Snoke, maybe he's a former inquisitor. I know there had been speculation he was the Grand Inquisitor himself although I'm not sure I'd go that far at this point. I do like the old notion that he could be Ezra just because it would be a bit shocking to see what he had become. Ezra would be about the same age as Luke so while not exactly ancient, he would be oldish by the time of TFA. I still don't see it being that outrageous that Snoke could be Plagueis returned from the ether to either avenge or clean up the mess his errant apprentice made and make a true Empire for the ages or somesuch. The fact he explored the mysteries of life and death and other taboo subjects gives LFL a springboard if they ever wanted it but I don't think that'll happen either. Just following his developmental history, I think he's just as likely to be some random Joe Blow that decided to stir things up 30 years after the fall of the Empire for some reason.