I still think that the system is fundamentally flawed in that it puts the officiating front and center as the most important aspect in deciding close games. It’s set up so that the refs re-review every important call: scoring plays, turnovers, plays inside 2 minutes, plus any other big play that a coach challenges.
You typically have a big play, followed by a lengthy review killing all game momentum, and then frequently concluded by a controversial decision that is hard to understand. That’s not what fans want to see at the key moments of a game. No one pays to watch the refs stare into a camera and explain archane passages from the rule book.