Yes, reading scripts IS important. It’s a very different way of assessing their values and strengths (and weaknesses too).
And at Premiumbeat.com some links that you already know and some others that maybe you don’t.
MORE ON SCREENWRITING? Check our posts How Billy Wilder’s SOME LIKE IT HOT Was Written, How Stanley Kubrick’s EYES WIDE SHUT Was Written, Best Screenwriting Books: Dmytryk’s ON SCREEN WRITING, Best Screenwriting Books: ESSENTIALS OF SCREENWRITING and Best Screenwriting Books: THE ART OF DRAMATIC WRITING, amongst many other posts!