Have you ever tried to write a screenplay? Or even a play? I have and it is NOT EASY. Writing stories and novels isn't easy either but at least they use the same kinds of sentences and paragraphs and stuff that we learned in school.
Screenplays are truly little bits of normal writing jammed between other nonsensical stuff that seems more like code than anything else. And then there is the structure of a screenplay -- sure, it has the same basic elements (beginning, middle and end) that a normal story has but it also requires a whole pile of other bits that they didn't teach us about in the classroom.
That's why it's amazing to me that J.K. Rowling's screenplay for Fantastic Beasts and Where to Find Them is so impressive. A master story teller in traditional prose formats -- her novels include not just, well, novels but also short stories, fables, news articles, magazine articles, advertising copy, and much more in terms of the forms of prose writing, all beautifully written -- J.K. seems to move effortlessly into the world of screenwriting as well.
To be honest, I don't really think Fantastic Beasts is a fabulous screenplay but it is indeed very very good, an amazing accomplishment for a novelist like Rowling. Sure, she probably got lots of help from the professional screenwriters who worked on the Potter films but still -- she has produced a credible, professional quality, exciting first screenplay.
I finally broke down and read the script after I missed Fantastic Beasts when it came out in theatres. My town is so small that films, even major motion pictures, only stick around for a week or two and, if you're distracted by life at the time, you're bound to miss out. I thought I could hold out on reading the script until the film came out on Blu Ray but... nope. I fell about three weeks short.
And, to be honest, I'm glad I did read it. I have gained a new appreciation for Rowling as a writer (a multi-talented writer) and I now have a clear idea of the story and the characters as I wait, with a great deal of impatience all of a sudden, to get my hands on the Blu Ray to see how this fun, lively, face-paced script was brought to life.
With The Cursed Child, I wanted to see the play to redeem what I consider to be an awful script; with Fantastic Beasts, I want to see the film to see this amazing story on the big (TV) screen.