Reapplying For 11th

Hi, I applied for both Exeter and Andover this year for 10th grade and was waitlisted at both. I know pretty much why I didn’t get in because my gpa was only around a 3.2 at the time I applied to both of these schools. My friend has a dad on the admissions committee of Andover and I asked him to review my application in which he explicitly stated the only reason I got waitlisted was because of my poor grades. Would It be worth it for me to reapply for 11th grade/ repeat 10th, given that I have gotten straight A’s the past two semesters in high school. Any advice would be greatly appreciated.