Best pure long range shooter the women's game has ever seen IMHO. So smooth, very quick release, beautiful follow through, and its the same motion and form every single time. She also never seems to think about her shot, she is a real rhythm shooter, she receives the ball and just shoots it, she lets muscle memory take over and her shot becomes instinctual, she never thinks about it, she just lets her body go ahead and do it, and at the core that's why she hits so many 3's.
The Sky's shooting is going to be out of control. They had 2 players at around 40% from 3 and another just a bit below that without Katie. Snipers on that team, and to top it off Katie is also a good playmaker in addition to being a tall and accurate shooter.