An Idea for the eventual End Update

My idea for the end update is to make the dimension have the vibe of "you shouldn't be here" so instead of adding vibrant biomes like other suggestions/mods, instead any new biomes could be made to be creepy. Naturally spawning endermites would also be really good. I have 2 ideas for potential mobs: Enderwraiths and Chorus Flies, Enderwraiths wouldn't be able to teleport but would be able to move through blocks and fly, the Chorus Flies would pretty much just be flying endermites that spawn near Chorus plants.