Tackles, and injuries and improvements
Even if you are going to make the game realistic by adding injuries in it, I think you can actually try to make it more realistic when the player is injured, you can add some more injured player movement in it, because the current injured movement is not even realistic, it is like a baby fall down and then cries And also I think you can also add player’s message to the manager, that way the game would be more realistic and more enjoyable