I THINK MY HEART GREW THREE SIZES. Ruby and Sapphire and cotton-candy Garnet, oh my gosh! Humming "Stronger than You"! Unexpected life-saving and discovering a new life together, not one that's fated!
How pretty was it, too? I loved the abstract, paper-cutout-ish look of it. And Blue Diamond and her freaky spider throne, wow.
Finally, Pearl is totally terrifying.
(ETA) Also: Homeworld's class issues (which we knew about already from Peridot, particularly) are emphasized and reinforced. Sapphire is rare and an aristocrat, and Rubies are common soldiers; but as small-g gems they literally the same thing. I love that Garnet introduced the Crystal Gems to fusing across gem types, though; before now it was plausible that Jasper's disgust at fusion was at Garnet's permanence, but now it seems that you are only supposed to fuse with "yourself."