Determining a basketball player's overall "offensive worth" is something I do often as a coach. I have to have some way to scout a player and figure out what their offensive potential is. Of course I look at stats, FG%, 3PT%, PPG, FT%, etc. These are definitely important but they're often misinterpreted.
You need to look at more than just those stats, you need to look at how those stats were achieved. What made the stats what they are?
The number one thing that contributes to those stats being impressive is ball handling and your handles.
All those stats come from first creating the opportunity, and 80% of the time that was through ball handling and dribble moves.
So when players ask me how to see big increases in their offensive stats, I tell them "yeah your shot is important, but you'll never have the opportunity to get a good shot off if you don’t have the handles to create the shots".