Thorax said it was a "nursery hive". Considering how Changelings go through three primary stages (grub, black, rainbow stag), each stage probably has a preferred environment to live in/that is best for it.IE: Much like how in a hospital, we have the wing for birthing and newborns. I could see Chryslis wanting to amass power and building her army by stealing an entire clutch of numerous eggs from one such area and raising them to be her soldiers, keeping them in the dark about their true growth and keeping them starving so that they would steal love with no questions asked to ease the pain.Now, we've seen that the more love a changeling amasses, the more they change; Thorax's wings changed from his time in the crystal empire. It's implied that Chrysalis has been around for a couple hundred years (Thorax says that the renegade changelings said "this is the way we've been doing it for centuries"), however, a changeling "feeding" results in the changelings absorbing the love given to them, and then they would return to Chrysalis, who'd drain that love from them to feed herself pretty much exclusively.She's larger, more elaborate, has something of a mane, and has well defined eyes.Perhaps she knows that if she were to "ascend", the more love you have before you do that generates a stronger form (Thorax was fueled by the crystal empire+flurry heart, Pharynx was fueled by the love of his brother and the love of the reformed hive, the other changelings just used the love they had stolen), and is planning to ascend into some… eldritch queen monstrosity…