I have had multiple kids appointed to multiple academies, between the 4 of them all except USCGA so far. It has also been a conversation that USAFA's appointment certificate is the most lackluster of the bunch. My DD never even received one, her alo lost it or something. Next DS had USMA and USNA mailed or handed to him pretty quickly, while USAFA wasn't until awards day at school long after the decision was made and we often wondered if it is something they only send to those that have accepted the appointment, a way to save money perhaps? Next DS also only received certificate at awards day. My youngest is still in the application process so maybe things have changed recently but he did receive the appointment certificate from USMMA within the week of it showing on his portal.
As you can see from my signature line the lack of nice certificate did not influence the decision but it was noticed. If I had to rank certificates/BFE packages, I'd go USMA, USNA, USMMA, then USAFA and honestly Ted Cruz's congratulatory appointment notification certificate might be ahead of USAFA
DD knows some that graduated recently from other academies, she argues that while USAFA might lack on the front end, their diplomas are the best and those are ultimately the goal anyway so eyes on the prize.