MSU was "on" Hall for a while, they just didn't think they had a spot for him, presumably getting Weems, and then prioritizing Brooks over Hall. Once Weems surprised everyone and went to DePaul, MSU immediately moved onto Hall, who was their 3rd wing. Basketball recruiting, the nature is you can't have a ton of offers out there like you can in football, you generally have a half dozen out there at a time. Hall was always their #3 wing, but needing to prioritze a big, they couldn't have more than 2 offers out there at once, so it was Weems and Brooks. Once Weems moved on, MSU moved on Hall.