I think way too much of the thinking about all this is ignoring that NIL is still a thing. This $20.5M now becomes the floor for most competitive schools, not the ceiling. As far as I know, there is no limit on NIL, so all that gets added on top.
This means, for example, that UConn could decide to use the entire amount on sports other than Basketball because we know we can generate lots of NIL for those programs but not for things like Football. As another example. the Big10 and SEC schools could allocate the vast majority to basketball because they know they can raise tons of $ in NIL for football, meaning its not as much of a win for the Big East as people may seem to think. Who knows how it plays out, ideally there should be a cap on NIL to level the playing field.