Why would you want to undo something that isn't a problem to begin with? What is it that you are worried about? I don't think you should hold her back to allow her to "grow up" more slowly. She is still the same person and is going to mature at the rate SHE is supposed to, regardless what age she is in. You can always postpone college later on and take some time to travel and do other things instead of jumping out into the workforce etc. We skipped DD and wouldn't think twice about doing it over again, regardless of her being the youngest one in her class. I don't think that is a wise option. If she is successful with it, I think you need to leave well enough alone.
