I don't know, I think no 3 point line would might actually make the game worse at those levels.
It does so much to spread the floor, for both the offense and defense.
If you have a 3pt line, a couple of offense guys will hover around the line, clearing up passing lanes, making it easier to penetrate, and also to operate down low.
If you don't have a 3pt line, the defense can pack it in more. At least with the 3pt line the defense has to extend to guard it.
With no 3pt line, you'll get a slower, more boring version of basketball. Eliminating the 3pt line will not lead to better fundamentals, because it's not the cause of bad fundamentals.