I thought the individual P5 conferences had to set a 'standard' for this and not that individual schools would set the standards - that just becomes an arms race and I doubt most P5 schools want that either. Every year there are only something like 10 D1 school athletic departments that turn a profit however they run their internal accounting. This is truly a mess.
Because of Title IX, the stipend will need to be equally distributed between men and women, but I do not think it needs to be equally assigned within a gender - lots of the lesser sports deal in partial scholarships already - 50%, 80% - whatever. A school I think could say we have 100 stipends each year - 50 for men and 50 for women and they can be assigned to 100 athletes or 50 athletes can get 100% stipend and 100 get 50% stipends, etc.
That kind of limited stipend might cause problems on the teams - you already have two classes of athletes - scholarship and walk-on. Now you might have three or more - Scholarship + stipend, Scholarship with no stipend, walk-on.