As a matter of fact, once you added a player's name to your username, the particular player was playing in God-mode. If I remember well, I was the one who recommended changing your username from Badass Devil to Badass Vidal. Arturo was excellent for Juve already, but when you took his name for your username, he became even greater.
Same with Dybala. He was brilliant in the first seasons after you changed your username.
My guess is that the username's power lasts for 2 seasons tops. You should change them more frequently. You hit the jackpot with Vidal and Dybala. You should do the same with someone else now. But don't keep the new username for more than two years, otherwise that player will be sold or start underperforming.
Come on now, do your magic.
I suggest you make a superstar out of Kulusevski. I think the kid has it in him. Badass Kulu has a nice ring to it. Maybe even Badass Chiesa. I wouldn't go with a defender, because we don't know if the username works on them. So no Demiral or De Ligt.