Grinch here. I have so many complicated feelings about this....bookscriptthing. On one hand, I literally grew up with Harry (I was 11 when I read book 1, 12 for 2 and 3, 14 when book 4 came out, etc), and I adore the world. On the other, LEAVE HARRY ALONE AND LET HIM HAVE HIS HEA. On the other other hand, JKR didn't actually write this, and it's a script. On the other other other hand, I read the spoilers, and I think it sounds terrible, and just SIRIOUSLY LEAVE HARRY ALONE, JKR. 
 I feel zero excitement about this project. I think having a play be canon is problematic because it's elitist, which is so anti-Harry that I want to scream. You can say "but this is the script of the play!" all you want, but you know that plays and musicals IRL are approximately 1000% more magical in person. Even filming the play or sending it on a world tour isn't exactly the same. 
 I think there's this thing that happens when a series (books, tvs, movies, etc) becomes beloved and popular, and it's that fans always want more, but eventually you HAVE to reach a point where you need to stop, otherwise what makes fans love it will go missing. Cursed Child has no magic for me. Harry's story has reached the point of no return for me because I was wholly satisfied by the completion of his story in Deathly Hallows. I guess Cursed Child is technically about Albus, but if that were entirely true, why is it called "Harry Potter and the Cursed Child"? If Albus were having his own adventures independent of his father's story, that's one thing. I have no desire to see a beloved friend from my adolescence be dragged down again. He overcame his conflicts already. I have to say I'm done.