Unless I've missed something, I'd love to see players in The Show 21 physically age over time. I'm not talking about stat regression but actual appearance. Maybe add a few pounds if they've lost speed. Hair turns grey as they approach 40. Maybe even return from the off season looking absolutely jacked and three years later hit 73 home runs to break the all time MLB single season home run record. Anything is possible!
Currently, custom players and those without a face scan can have an "aged" appearance added and the intensity adjusted with a slider. This should be added to all players that gradually increases with age. Think it would add to the realism of the game.