My ratings we just used to paint a picture, but I can see where you are going. I can half agree with you and half disagree.
For instance this player would now appear as an 18 y/o Center with 5* potential 5* rating.
Salary 4 423
Age: 18
Height: 5'11" / 185 cm
Potential: MVP
Game Shape: respectable
Jump Shot: inept Jump Range: atrocious
Outside Def.: awful Handling: pitiful
Driving: average Passing: inept
Inside Shot: average Inside Def.: respectable
Rebounding: average Shot Blocking: mediocre
Stamina: awful Free Throw: average
Experience: atrocious
I wouldn't rate him as a 5/5* Center if I was coming up with the ratings. I would rate him as a 5* potential 2* skill guard. He could be good with the right training, but he will be pretty terrible starting off.
In addition, a star potential tall forward would appear this way now: 18 y/o PF 3* potential 5* skill. Under my system, he would be a 3* potential 5* skill (same exact ranking). Where the current and proposed systems differ is where that player were a short PF with star potential and good forward skills. He would then be a 3/3* Guard, which I feel would be more accurate.