I believe there has to be a true redemption story here... the first one in Star Wars, and it will go out in episodes VIII and IX.
And it's related to the idea of being capable to use both sides of the Force (KOTOR, again...?).
I belive that's the true awakening... it's happening with Kylo, and it will happen with Rey. And, probably, it happened with Luke...
It is too late for Kylo just to be a hero, because he has killed his own father... but he can realy be redeemed. He's going to find out that there is no such thing as absolute good or pure evil, in fact there is a grey area where things become real.
That's why he didn't kill Rey. He wants to teach her, and he needs her ! She's equal and the only one that can understand this, like him. She will save her in the futur.
I quote Jack Carr:
«Kylo Ren and Rey are two sides of the same coin, which makes it almost inevitable that at some point in the future - even if not until Episode IX - they will find themselves fighting as allies.»
And the enemies, the truth villains are Hux and Snoke and all the gang of the First Order.
Wait and see...