Sports cannot replace test scores and grades. I am neither varsity letter nor did I do exceptionally well on the CFA but being top of my class and taking advanced classes at a college level is what pulled through. The USNA is VERY academically focused and strongly pushes science and engineering. The more varsity sports the better but you want to make yourself as unique as possible. What can you offer that other typical varsity letters that have it all like you can't offer? Maybe trying to talk to your Blue and Gold Officer about your experiences in France during the interview. If you did any volunteer work list it! Volunteer work is also extra points.