yeah but can shikamaru use his chakra with 100% efficiency? He also might not be able to distinguish between jutsus that the enemy is performing, or observational things like that as well as sakura either.

I think sakura is more aware about the way things work and whats going on, while shikamaru is more aware of the way a person thinks and reacts and other psychological stuff.

sakura is more aware of the details inside the box, while shika skips that and looks outside the box instead