[youvalss]

Not sure how this could work online, but at least for offline I thought it would be great to have the in-game quick substitiotion menu work like the weapon wheel in action games. You know, when you open the weapon wheel and everything slows down in the background, yet it's still happening in real time.

I think this could work well here. Players in real life don't need to worry about setting substitutions while playing, so no reason we would need to deal with subs and on-court action at the same time. This way we have peace of mind to focus on substitutions without worrying about missing out the action, yet no need to pause the game, it's all still happening in real time.