I’m the king of over thinking - my daughter chose a “lesser” - I need to stop saying that - school.
It’s four years - gotta go with it.
Really your son needs to decide - if he really wants Miami, going in - I don’t want to say second class - but that’s how it seems - does that work? He can work in the Fall or go to a CC. Or does another school work? Or would he want to get into AZ - easy app - then go visit - and might that work? Or other schools still taking apps.
Whatever you do, love your decision - and it will work out great. In 20 years, he’ll be where he’s supposed to be regardless.