If its anything like City Living festivals I don't want it seeing as we pretty much can do the first two things on your list now and those festivals are so boring. I'd prefer the option to make a regular or spooky themed carnival with its own lot type. Could have objects like a haunted house, mini coaster, ferris wheel, merry go round, a kissing booth games like bobbing for apples and those chance games no one can win. New carnival music or the spooky station can be played with the option to set clowns or Sims walking around in scary costumes trying to frighten Sims.