I am training big men for 3.5 seasons that i am playing the game so my conclusions are that passing is important for every position. (My star C has 1 on PA too), couz it helps to get better shots. Handling is not an issue too. What i would suggest is JS training, something that doesnt cost anything (at least up to some lvl), but it helps a lot. Actually my big men with the best % are those that they have good JS and some PA.
Overall my opinion is that u dont have to worry for those deficiencies, and keep training him. In your hands u have a future NT player.