There's an extra level to unlock in his game as well.
I mentioned something similar in my past criticism of Odegaard, that even when he had good performances, he passed up quite a few decent shooting opportunities - not anymore. Level unlocked.
For Saka, it's his right foot. His left is lethal and all, but once he is able to put in crosses on his right foot even semi-consistently, he will become virtually unplayable.