These are probably my favorite addition to SwSh. A customizable trainer card that you give and receive when you link up with other trainers is something that you'd think would have been implemented sooner. I also think the in-game league cards for gym leaders were a neat way to finally get some character for the gym leaders which has been something these games have always failed at. Though it would obviously be better to learn more about gym leaders in the game instead of through a trading card in a menu.

I can't wait for league cards to never appear again until SwSh remakes.