I will also add that one coach - not Ivy but always grouped there - made a schedule request to our child - they wanted to see one more higher level comp sci class on her transcript even though she was not planning on majoring in comp sci (not MIT fyi) - had she waited to begin conversations, she would have never been able to make this change. She did add this class for 2nd semester jr year and ended up not pursuing this school
or program (not a good fit in many ways) - but what if she loved it and found this out to late to add this class - would it have knocked her out - who knows ?
Lastly - just a reminder there is no athletic money in the Ivy league only financial aid if your qualify - many families do not understand the financials when they start this process.