Messing with the NFL certainly has some risk. IMO, since it is always trending up, I wouldn't change anything drastically like they are proposing. You are making money hand over foot.
The National Football League (NFL) is the most profitable professional sports league in the United States. The total revenue of all 32 NFL teams has constantly increased over the past 15 years, rising from about four billion U.S. dollars in 2001 to over 14 billion U.S. dollars in 2018, the highest figure to date.