Fosse76 said: "They do it with Shakespeare all the time, and Cursed Child is no Shakespearean play."
Haha, I was thinking the same thing. Nobody cares if you cut Fortinbras from Hamlet, so why not the Trolly Witch from the Harry Potter Play?
Having said that, I've reflected on this a bit more, and I actually don't necessarily think this would be the best thing for the play artistically.
I don't have any objection to making drastic cuts to established plays. In fact, I think a lot of established plays would really benefit from major cuts, if only the authors and their estates would allows it. Hork, your comparison to Angels in America is interesting to me, because I actually think Kushner is incredibly rambling, and often self-indulgent. I think Angels has a lot of those qualities as well, and I think there's actually a lot of stuff in Angels that could be cut without harming the story.
HOWEVER, I like Angels anyway for 2 main reasons (1) while I think some of it is unnecessary, most of it is brilliant, and (2) the fact that he goes to SUCH an extreme with it - 8 hours of material - makes the fat more forgivable. Because like I said before, it becomes an epic experience, and the audience is along for the ride. If it were just as rambling, and indulgent, but only lasted 3 hours, I don't think it would feel nearly as good. And in a way, I think the same is true of Harry Potter. Because while a lot of it is easily cuttable, the main issues with the play, for me, are not in the length or the extra fat. For me, it really just comes down to shoddy dialogue and poor treatment of the canon. And I just don't think that would be fixed by cutting it down to 3 hours.
So if you made all those cuts, the script still might suck, and maybe it would suck even more; and in the probess you've now also robbed the text of (IMO) its main positive attribute: which is the sense of being on a grand, epic adventure with these characters.