Clues to the ST from early ANH drafts

I've been looking again at Lucas' early drafts of Star Wars: A New Hope (or just plain old Star Wars to the oldies like me)

This site is really useful http://starwarz.com/starkiller/the-development-of-star-wars-a-new-hope/ as is the book Star Wars: The Annotated Scripts.

Reading through it's clear that Lucas never completely gave up on many themes/ideas/names and recycled them in ESB, RoTJ and the PT.

I know Lucas' original outline for the sequels was rejected, but do we know if that means EVERYTHING, or whether some themes were retained? With Lucasfilm Story Group still holding the reins, I expect we might still see a few of these very early Lucas ideas creeping into Ep VIII and IX.

When RJ revealed which films were influential on VIII one theme kept recurring, uneasy truces and opposing forces working toward a common goal. In the '74 "The Star Wars" draft (serialised by Dark Horse in comic form) the distinction between Jedi and Sith was not so polar. Both were force users, but they had different alliegences in a war - it wasn't so much the good vs evil as we have come to know. In that version Vader (a Sith loyal to the non-force-user Emperor) tortures Annikin (a character comparable to Luke.). Valorum (another Sith) recognises the similarity between the honour codes of both Jedi and Sith and changes sides to rescue Annikin and defeat Vader. Obviously that theme crops up in RoTJ with Vader's redemption, but I wonder if it might also make it in a slightly different form into VIII/IX.

We are told that Kylo is not a Sith. Is there more to this than simply complying with events of the OT? Maybe the Knights of Ren are not evil per se, as the Sith were. Perhaps they are more like the grey Jedi of the EU: non aligned force users.

In the '75 second draft two other interesting elements appear: The Kiber crystal and force draining.

Deak and Luke are early incarnations of Luke and Leia. Deak's quest is to recover the Kaibur Crystal to restore the Ashla (lightside) which has been weakened by the growing power of the Bogan (darkside) This will allow his Jedi father the Starkiller to defeat the evil forces. This Kaibur crystal is small enough to be hidden in his belt - not the larger version from Splinter of the Minds Eye. Small enough to be in a lightsabre perhaps? Deak is captured by the Sith Lord Vader and is force drained. Vader is unaware of Deak's brother Luke, who reluctantly accepts his destiny as the son of a Jedi and saves the day by retrieving the Crystal, restoring his brothers power and restoring the power of the Ashla.

There's also some very interesting early ideas about the discovery of "The Force of Others" by the Holy Man known as the Skywalker.

So in summary, these are things that I think might crop up in the ST (and already seem to tie in with rumours)

1. The idea of enemies working together to defeat a common enemy. Is Snoke a 'force vampire' sustaining his life force by feeding off powerful force users; as much a threat to Kylo as he is to Luke/Leia?
2. The rumour of a force drained Luke, in exile for his own protection
3. A small easily hidden Kaibur crystal which amplifies the force - is this the one in Anakin's sabre?
4. A hero reluctant to accept their destiny as Jedi (could be Finn or Rey in my eyes)

Thoughts?