I don't know if anyone ever said Redick couldn't shoot, and if they did, they're idiots.
Hendo couldn't shoot in college, hasn't been able to shoot in his time in the NBA, whether it be preseason, SL, regular season, or post season. The only thing he needs to be doing--ever--is shoot jumper after jumper after jumper in the gym. Simple fact is, the more you shoot, the better you get.
In my perfect world, UPS (who is every bit as limited as Hendo, but that's another discussion) replaces Crash and Hendo replaces Jack.