I hope the Smart supporters are correct. I just don't believe Marcus will ever become a good shooter in the NBA...he wasn't one in college and he hasn't shown improvement yet in the NBA.
I agree - not sure if he'll ever be a good (i.e. > 36%) three point shooter.
But I think he has the potential to be a good playmaker, rebounder and defender at the PG / SG spot, and I think he'll be able to become "good enough" (e.g. 34% - 35%) a three point shooter to get by.
For example:
* it took Lowry four seasons before he started to shoot >36% from three on a consistent basis (career FG% of 41.7%).
* John Wall shot < 30% from three until his fourth season, and to this day he's still never shot over 35.1% (Career FG% of 43%)
* Kemba Walker has been in the league for 5 seasons, still has yet to shoot 35% for a season from three (career FG% of 39.9%).
* Derek Rose has been in the league 7 seasons, has yet to shoot 35% for a season from three, with is career average being 29.9%.
If you look at all of the top 10 guards in this year's highly celebrated draft, Mario Hezonja is the only player on that list who is shooting respectable numbers this year. Other than that you have:
* D'Angelo Russell Shooting under 31.8% from three and 40.5% from the field
*Emmanuel Midiay shooting 25% from three and 31.2% from the field
* Justise Winslow shooting 22.2% form three and 39.3% from the field
We are witnessing a very strange and twisted league these days, where we have star guards who can't shoot, and star bigs who cannot rebound or defend the paint.
What this means for Smart is that even if he never becomes a "good" shooter, he'll still be more than capable of being a good player - as long as he can do other things at a high level. If he can grow into an elite defender, and a good playmaker and rebounder, and develop a competence for getting to the basket and to the line, then that's fine.
If you're a guard in this league you don't need to be able to shoot, as long as you can do everything else well.