I do not know specifically about these skills of GK.

But my impression till now is that individual skills (throwing, shooting, finishing etc etc) play no role in the game.
It seems for me that the total % of quality of each category only matters (attack, defense etc)

I ve seen player with half "speed" skill, running like devil.
I ve seen player with half "shooting" skill, scoring from Mars.
I ve seen player with half "finishing" skill, scoring more than the best finishing striker.

Having this impression (without knowing if it is correct) I stopped watching individual skills and pay attention only to % quality.