It's funny you'd mention Riley. I was hoping he'd become a more dependable 3 point ace, but I saw a recent photo that was snapped just after he'd released a 3 pointer and his follow thru is terrible (or at least in that pic it was).I thought Norris was morphing into a pure spotup jump shooter but then he started firing air balls...
I'm pretty amazed at the lack of fundamentals in the shooting motion these days. Suffice it to say, if a player doesn't have his elbow perpendicular to the goal under the ball and if his wrist doesn't follow through upon release directly toward the goal then there's not a real good chance of it going in.