Could you post the list of schools you applied to this time?
I looked at posts you have made so far and maybe part of what you can change for next year is your school selection.
Some of your schools like Minnesota, Wisconsin, are state schools that heavily favor in-state applicants.
You could next time apply to private OOS schools as well as all your IS Florida schools.
Your activities, experiences, and numbers look good and I don't think you need to retake the MCAT.