I have no clue how to rate this as I saw the play and then read the script. Plotwise this script is still really confusing to me with all the (view spoiler)[timetravelling (hide spoiler)], and I can't get over how J.K treated some of my favorite characters, like (view spoiler)[how Ron was a complete comic relief, and how out of character Harry constantly acted. (hide spoiler)] However I really did enjoy it in it's entirety. It was fast paced and I really like how (view spoiler)[Draco finally got some depth to him other than being "the bad guy". We finally saw how he felt in all of this. (hide spoiler)] It was very interesting to see. 
 Also could we all just take a moment to appreciate how wonderful Scorpious is? He is so precious and even more so in the play. I relate to him so deeply! He quickly became one of my all time favorites of the Harry Potter universe. 
 However having seen the play I noticed a few lines/parts missing, which was kind of a bummer to see as I felt like some stuff - (view spoiler)[like in the ending where they defeat Delphi (hide spoiler)] - was shown better in the play than it was written. What I really loved by the script format was that I could emerge myself into what they were saying and I could read it over and over again if i didn't get it the first time. That wasn't really a possiblity in the play, so I caught a little more of what they were saying, which was such a nice supplement to the show! 
 All in all. A very nostalgic read with a few good parts, but with a decent amount of disappointment around the plot, the characters and the timelines, but still very enjoyable! But if I have to rate the play versus the script, I'd pick the play!