1) Coaches salaries and the coach dujour syndrome.
2) The shakedown aka Les Miles disease.
3) Long term extedended contracts for recruiting purposes.
4) The arms race aka practice facilities athletic dorms and chartered jets.
5) The overall stench that is AAU basketball and the infiltration of "shoe money"
6) One and dones.
7) Diminished attendance both at ND and at top tier schools.
8) While I don't have any data to support my conclusion I suspect the "Big Dance" has some underlying problems both with arena attendance and telivision viewership.
That being said I have the feeling that the NCAA's inabilities to sensibly police both the AAU circuit and recruiting practces combined with a silly one and done policy is going to kill the "goose that laid the golden egg"
I think there is a measure of truth to MNG's "black sheep" statement from the standpoint that while football remains a cash cow they'll have the stomach for competing. It can't and likely won't ever be allowed to lose money. Once that happens it will be on a very short leash as well.