Peridot has learned a lot from the Crystal Gems. She's gone from a sheltered, brainwashed Homeworld Gem, to a free thinking, Earth living Crystal
Clod Gem. Peridot did tell Amethyst that "I'm still learning. I hope you understand. I want to understand." So even though when the episode began she wasn't 100% on board with Garnet being a constant fusion, she did pose the questions to Garnet that were nagging on her mind. All the gems on Earth seem to be different from what Homeworld taught her, thinking and acting and working together in way's she's never seen before. Peridot seems to finally be getting what the Crystal Gems are all about, thanks in no small part to Garnet. The Appraiser has a review of the episode at the link below!