Elphaba got a bit more backstory. Galinda felt a touch more real. Fiyero is a hair more fleshed out. Boq felt like an afterthought. Miss Cottle (Keala Settle) is in this and takes up what are usually Morrible's lines/actions (maybe because they were hers in the book originally?).
One Short Day was by far the best overall, but Defying Gravity, everything leading up to what we've seen in the trailer, was also impressive with how they made running to the attic of the castle a big part of the scene/song. Popular was fun; it and Wizard and I and DG got standing ovations.
This screening was for the Broadway family so the energy was extremely high - applause after every song, lots of reactions to the delivery of certain lines, and of course, to seeing their friends and surprises on screen.