A change to the phantom (Insomnia)

The phantom is overall a quite cool mob but i think it doesn’t really fit in minecrafts gameplay. I have an idea that instead of spawning in the overworld phantoms should spawn in the end (midland and highlands), i mean it makes sense since it looks like a creature that comes from the end and it fits more to that theme anyways. Another thing that should be implomented is a real insomnia effect that slow down and weakens the player instead of spawning phantoms, it makes more sense since effects like bad omen and beacons/conduits already exist in the game.