That's the funny part, and we take SW for granted at this point. But, it really was something extremely unique that much of Hollywood had little regard for. It was a dumb kid's movie, and it stressed out Lucas to try and do things the way he wanted to, which is why he ended up quitting the Guilds of Hollywood. It was a lot of stress, and improvisation, and support from people like Al Lad Jr. at Fox and actors like Sir Alec Guiness.
And that's why when people talk about recapturing the spirit of Star Wars it's like asking a band to recreate the sound from their first album after being on the third or fourth. They have learned so much since then, there is a different feel, there are less rookie mistakes and more polish. So, capturing that feel is very difficult.
That's why even if Lucas redid the ST it would not be like the OT.