My first script,
my VERY first script, has gone through some major rewrites.
It started out as a novel with tons of detail, facts, history, tidbits.
Then I got into screenwriting and toned it down.
I didn't draft it out, other then the novel version, I just wrote it flat out.
After a bunch of studying the craft and reading scripts I went back and totally deleted my secondary character who was to be the "Russell Crowe" type romantic lead.
Just cut that puppy right out of there because, it wasn't working. It split the story into two incompatible parts.
I rewrote the script so that now one of the antagonists who is much more involved in the plot and theme of the story becomes the love interest.
I've twisted my story every which way trying to get my main character to arc but none of it feels natural to her character. Each new idea, while a good way to create arc in and of itself, doesn't mesh with the needs of the rest of the story. So, I think I will go back to what my heart says works.
Other then that one script I don't really find myself rewriting that much.
Now I plan things out a bit more, think them through in my head, keep notes and fully develop most of the story in a notebook first.
I do a lot of polishing. Add in in details, taking out fluff, honing down dialog and shortening up scenes.