At least one of these was alluded to in the Seth Wilson thread.

https://www.usatoday.com/story/sport...all/698734002/

Transfers:

Transfers may now leave without asking their current school for permission. Under this new “notification-of-transfer” model, student-athletes will have their names entered into a national database, and coaches from other programs can then reach out to gauge interest.
Redshirting:

[quote Previously, players were given five years to complete four seasons of eligibility – meaning one of those seasons had to be spent without participating in any games, often during a student-athlete’s first year on campus. The same four-in-five timeline exists, only with a catch: Players can now participate in up to four games in a season and still retain that year of eligibility, ...[/quote]

Pretty exciting news for incoming freshmen, I'd think.