Once again, let's make this clear.
Moise was NOT academically qualified on NSD, which is why he never got an LOI or an FAA. If he signed either document, and then failed to qualify, Miami would have lost an IC.
SINCE NSD, Moise has apparently gotten a sufficient SAT score and/or retook enough of his Freshman-Junior level courses to guarantee that his GPA will no longer be a disqualifying issue.
HOWEVER, he will still fail the "academic redshirt" rule and he will be ineligible to play in 2020. So, yes, he is "qualified" to be admitted, but he is not able to play this year.
Prep would be best for him. Not sure if his family will see it that way. I'm sure they are perturbed by Miami finding a spot for Walker before Moise. On the other hand, if Walker had signed with Miami earlier this year, Moise would have been encouraged to look elsewhere.