Your response assumes there are no more 2020 slots. Other posters also assumed UMs class was full. Yet on May 9, 2020 we got and signed Issiah Walker with an available slot; no blue shirt and no waiting until the day after fall camp begins to sign his LOI.
Subsequently, Manny Diaz, in a May 15, 2020 interview, stated that the Hurricanes still have the capacity, from a roster and scholarship standpoint, to add more players to the 2020 team; ie available slots (This could be in part related to Moise and Asa Martin).
I haven’t seen anything since, which says there are now no more available 2020 slots.
In giving weight to roster management issues and slot availability, I’m inclined to go by what the coach says and what is actually done (e.g. giving a scholarship to Walker) as opposed to what’s written on a message board.
As a side note, If Williams truly wants to come to UM - an assumption or guess is all it can be at this time, and there are now no more slots for 2020. there is nothing for Williams to presently announce. He’d not only first have to get accepted into grad school, but UM couldn’t even offer him until after the first day of fall camp. He could accept the offer and then announce his commitment. If UM did otherwise and offered beforehand that would be actively recruiting him and he would not qualify for a blue shirt admission.