Ok, dont want to get in the mix of all of this BUT... I must say this...
"One of the reason's I'm so impressed with the stage musical is how vastly IMPROVED it is over the book, which, though impressive, I found rambling, disorganized, disjointed and frustrative. McGuire seemed to take pleasure at missing connections, dropping threads that go nowhere, introducing characters only to drop them ... and worst of all, amost ALL the action occurs BETWEEN chapters .... very odd.
I marvel at how the authors of the stage musical where able to coalesce the plot, tighten it, make ingenious and meaningful connections (like the scarecrow, the tin man, etc.) and to have things generally make more sense (e.g. on stage, Nessa's ruby slipper's allow a crippled girl in a wheel chair to walk. In the book, she is ARMLESS (wtf?) and they help her to Balance. Bizarre.)"
IMHO, The book has so much more to offer than the the musical. Yes, Nessa is armless what is wrong with that. If anything, it adds to the plot, having to depend on Elphaba more, and more reasons for how she is in the end of the novel. I won't keep going on, but I disagree completely with saying the show is an improvement to the book.
I want to write music. I want to sit down right now at my piano and write a song that people will listen to and remember and do the same thing every morning...for the rest of my life. - Jonathan Larson. Tick, Tick...BOOM!