Good start. I would like to see more jumping if your going to use the swat ball SA. Shed block would probably be better for a NT. If you work your jumping up you will see that SA kick in more.
Keep building up your ST and AG but dont forget speed or else your NT will seem like he's running in sand.
Get your dline Gen up to 5+ over time also. Makes a huge difference for the whole Dline overall. And dont expect a huge number of stats. NT's job is to take on blockers so your DEs and LB's can run free. if you end the game with 0 tackles but get blocked by 2-3 guys a play you'll be a all star.