These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Joey King as the China Girl is often cited by critics as the best character in the movie.
"Funny Aneurysm" Moment: When Glinda reveals Evanora to be the real villain of the story and that Evanora had tricked Oz (you know, like he did back in Kansas, only with parlor tricks instead of real magic), suddenly Oz's interactions with Evanora become Laser-Guided Karma.
Genius Bonus: Oz's love interest back in Kansas, Anne, is going to marry a man named Gale. Many sources give Dorothy's surname as Gale.
A number of people are already condemning the film simply because it contradicts/has nothing to do with Wicked, while others are complaining that they got Elphaba's name wrong. On the flipside there are fans of Baum's book that are tired of people treating Wicked like canon, and so are happy to see an alternative prequel.
It is also getting a lot of hate simply because it is a prequel.
Jerkass Woobie: You will want to reach through and hug Theodora but after seeing Evanora corrupt her, you wouldn't be too unjustified in keeping your distance
Les Yay: Some see it between Evanora and Glinda, or possibly Theodora and Glinda. They both seem obsessed with caressing Glinda's face and calling it pretty out of...jealousy. Yeah, jealousy. Sure.
Moral Event Horizon: If Evanora hasn't already crossed this with the murder of Glinda's father, she crosses it when she tricks Theodora into losing her heart and all her goodness, and becoming a witch more wicked than she is. Even she realized after this act that she had taken her quest for power too far and that there was no turning back.
Again, Theodora. It's rare that a performance can be so hilarious and terrifying at the same time, but Mila Kunis somehow manages to pull it off.
Oscar's performance as "The Great and Powerful Wizard of Oz" is such over the top scenery chewing that it would plunge headlong into Narm territory if it also didn't happen to be his truly epic victorious Moment of Awesome against the wicked witches with Rule of Cool on his side.