Vanilla Upgrade adds a variety of new content designed to refresh the experience of Minecraft PE. The first signs of change can be seen in world generation, with new trees and biomes appearing. Essentially, each dimension will receive at least one new biome. I came across a cave biome with crystal-like structures that weren't made of amethyst.
In the desert, I encountered occasional termite nests, oases, and geysers. Another time, I discovered a house in the Mesa biome filled with Illager-type mobs. But it doesn't stop there... The addon also introduces items with new mechanics that can enhance your gameplay.
Credits: villagecool