There is one rather alarming subtext in the SW 1974 rough draft that reoccurs elsewhere in Lucas' work, which I haven't mentioned yet. Namely, sexual assault happening to the principal heroine.
The scene in the rough draft where Leia reappears on Yavin, having been stripped by the jungle trappers, raises a disturbing question. Did the trappers rape her? The answer: Very likely yes, but it's deliberately never stated outright.
Consider: When Lawrence Kasdan wrote his first pass at the ROTJ script, he included a scene where the captured Leia asks Threepio what fate Jabba will deal out to her. "Death?" Threepio responds: "Worse." Kasdan is alluding here to the phrase "a fate worse than death," the old euphemism for rape. So this is basically an in-your-face announcement that Leia is about to be sexually assaulted.
That was undoubtedly too explicit for Lucas to countenance. So instead, when Lucas revised Kasdan's script himself, he changed the dialogue here. Now Leia tells Lando, "I'll be all right." Lando responds, "I'm not so sure."
With this new dialogue, Lucas creates ambiguity. Is Leia in danger or not? The intent, of course, is to play to two different audiences. Kids will think only of mortal danger, and not grasp the subtext of the scene. Adults, however, will understand exactly what is being implied here. The dark implications of the Jabba scenes have not changed--only the extent of their verbalized expression on screen.
In a similar vein, nothing in the SW rough draft is ever explicitly said about how far the trappers got with Leia Aquilae before Annikin interrupted them. However, they clearly had time to knock her unconscious, drag her off and strip her. They may have done more, or not; the details are left to the audience to fill in for themselves.
In The Hidden Fortress, there is a scene where the slave girl whom Princess Yuki bought and freed earlier in the film repays the favor, by preventing Yuki from being raped as she sleeps by the bickering peasants, Matashichi and Tahei.
However, in this instance Lucas has chosen to deviate somewhat from the model of Kurosawa. Instead he portrays Annikin Starkiller as avenging Leia's pain and dishonor, cutting down the trappers in a frenzied rage.
This point in the original script is therefore clearly also the genesis of the scene in AOTC where Anakin Skywalker finds his dying mother in the camp of the Sand People, then proceeds to slaughter all the Tusken Raiders in the camp. As with Leia in the 1974 rough draft, it's heavily implied that Shmi has been sexually abused.
Given that a rape scene transforms Leia Aquilae from a robed virginal Marian figure into a bare-breasted goddess of Liberty, one could probably write a whole dissertation on the Madonna/whore complex as Leia embodies it in this rough draft.
I suspect this rather distasteful element is actually another marker of the influence of Robert E. Howard's Conan stories on young Lucas. In Howard's stories Conan's love interests are frequently slave girls whom he liberates from their former masters. Invariably the narrative dwells on these women's loss of their "virtue" to their captors--never naming rape explicitly, but always implying it. Both Lucas' casual suggestion of rape and the coy manner in which he handles it are highly reminiscent of Howard's writing.
The influence of Conan on Lucas' portrayal of female sexuality may also explain the idea, suggested in Raiders of the Lost Ark, that Marion Ravenwood worked as a prostitute in a Nepalese brothel. Once again Kasdan wrote dialogue explicitly confirming this, and once again it was too frank to make the final cut.