Memorizing 20-30 or even 40 lines is next to trivial for a Super GM. And prior to this year with more decisive games, the championship was becoming incredibly stale with every event being decided by tie breaks. And despite how exciting this event was, it was still decided by rapid tiebreaks. So do what Carlsen says, reduce the number of classical games and throw in rapid and blitz, winner takes all. That makes the most sense.
Quite the opposite approach would be better. Tiebreaks only happened because players are actively seeking them for various reasons, playing to 14 draws in previous matches. Set the formula to 5 wins in classical (like it used to be), and it would be a real chess championship event. Players would no longer seek draws hoping for some luck in the tiebreaks.
