The NFL has argued that Sunday Ticket was a premium product thus they kept the price high. The counter argument was that the NFL kept the price high so it wouldn't pull eyeballs from NFL national games on CBS and Fox and damage that relationship.
Another issue in the lawsuit was the inability for consumers to purchase Sunday Ticket for a single team. For example if a Bears fan in Seattle wanted to have access to only Bears games, they had to buy the entire package instead of paying possibly a lower price just Bears games. ESPN was willing to offer that but it was rejected by the NFL.
With games being spread between CBS, Fox, ESPN, Prime and Netflix I don't see how Sunday Ticket will still be relevant in the future.