One thing I keep going back to is all the hoo-ha from the prequels to the original films about either Anakin or Luke "being the one" who would bring balance to the force and if you think about it the force ain't balanced if you have one side winning,balance implies there's a use for both sides or you need to wipe both sides out so.....
I'm going to try this one more time... Lucas said the whole balance of the Force thing was a JEDI prophecy. So it's a prophecy using their ideology, not what any fan or dictionary says "balance" means. Balance of the Force means the complete absence of the Sith. When the Sith are gone the Force is in balance. Anakin fulfilled the prophecy when he came back to the light side and chucked the Emperor down the reactor shaft. In AOTC (I think) Yoda and Mace talk about the Jedi losing their ability to use the Force because the Dark Side is gaining influence, and unbalancing the Force. That's what the Jedi mean in regards to the prophecy. So it's not about X amount of Dark Side users vs. X amount of Jedi.
I'm still hoping Snokes is not a Force user at all. If I were writing this stuff, I'd keep the Sith in hiding for a long time. That's IF the Emperor had any secret apprentice. Otherwise it would be a false Sith lineage with someone just following their rules and using their methods.