Imo the best at keeping the ball from rolling to the backstop. Receiving is nice and the arm shouldn't be too bad but the most costly thing at lower levels are passed balls. This is not just about blocking but also picking and just plain catching the ball and not letting balls glance off the glove or drop strike 3s out of the glove.
He should hit some too but a passed ball is about as valuable as a hit so you can't really hit enough to compensate for 3-4 passed balls per game.