His height makes him a big man. It's probably better that his secondaries already started off decently well, since those tend to pop slower than inside skills based on height. Yes, he will take a lot of work on inside skills but with ATG potential and 7 seasons, who knows? The NT needs bigs with good secondaries.
Even if he doesn't become an NT player, he will become a fantastic player for your team, and his value will increase on the market, once your dine training him. It's very hard to train NT players given, salary, and training out of position, they ususally are 28 yrs of age to be considered for the team. There are no guarantees for your player making the team, but given some time, dedication and patience he could catch up to comparable players his age.
Trust me all the hard work will pay of you have an amazing prospect you can invest in. I had many nay sayers tell me my trainee can never measure up as NT caliber. I still have a lot of training to catch him up with the rest of the players, however he still is a great player for my team. Hard work definitely pays off.
My trainee
Then:
Age: 18
Height: 6'10" / 208 cm
Potential: all-time great
Game Shape: respectable
Jump Shot: average Jump Range: pitiful
Outside Def.: respectable Handling: mediocre
Driving: average Passing: respectable
Inside Shot: atrocious Inside Def.: pitiful
Rebounding: inept Shot Blocking: mediocre
Stamina: inept Free Throw: mediocre
Now:
Age: 22
Height: 6'10" / 208 cm
Potential: all-time great
Game Shape: strong
Jump Shot: proficient Jump Range: pitiful
Outside Def.: proficient Handling: prominent
Driving: prolific Passing: proficient
Inside Shot: prolific ↑ Inside Def.: proficient
Rebounding: strong Shot Blocking: respectable
Stamina: awful Free Throw: mediocre