If you're planning on going to Case if accepted then go. If you're happy with the three acceptances you have now and probably not even attend Case if accepted then you shouldn't. It will help someone else get that interview spot or allow someone to move up their interview to an earlier date. I think you should ask your self... Would I attend Case if I were accepted? If you're not sure then just go to the interview because you'll only regret it later. 🙂👍