Speaking of changing your form and routine shooting free throws, remember what Josh Boone did? I think it was his sophomore year when he would extend his hand out, palm up with the ball, then turn it over, etc. His shooting FTs improved significantly. And you know what he did the next year? He stopped doing it and his FTs became crappy again. What a head scratcher! His poor FT shooting certainly hurt his NBA career and probably still does if he is playing somewhere now.
So, routine changes can make a big difference, but the player needs to be willing to be teased or take whatever comes. Why none of these crappy foul shooters try the Rick Barry underhanded method is just beyond me. If it could make the difference between playing or not playing, why not? Andre? Rodney has been playing pretty well, but he is often overly emotional and reactive (see him about to start a fight in the Texas game?) which also does not help in crunch-time.