The only thing I can think of (and this applies to the entire trilogy) is for it to be R rating material.
Mind you, I love the OT as it is. However, I always imagine an alternate universe where the lightsaber doesn’t cauterize wounds, blasters result in bloody sprays, the Rancor graphically devours its victims, Jabba’s eyes pop out when Leia kills him, etc. Obviously I would never expect exploitation-type violence, just something in the line of Conan, the Alien franchise or John Carpenter’s films.
Essentially such a scenario would have prevented the franchise to become what it is now, albeit the films would still get a much deserved cult following.
While I don’t see how weapons utilizing superheated plasma could leave behind bloody injuries, this.
I also would’ve liked some more sexual content in the series. I’m not saying we needed any sex scenes, but some nudity wouldn’t have hurt.
With all these elements, I probably wouldn’t have been able to watch Star Wars as a kid. I wouldn’t have played with Star Wars Legos, I would have never watched the DVDs and noticed how they are not the same movies I’ve seen for years. I wouldn’t have hated CGI dinosaurs and I would have never visited OT.com. I probably wouldn’t be interested in movies and moviemaking as much and I wouldn’t have watched films like 2001, Blade Runner, Alien or Robocop. Even if my interest in classic sci-fi movies would have been sparked by something else, Star Wars probably wouldn’t be my all-time favorite movie.
So, no. Star Wars doesn’t need isn’t improved by these things.