I've always known the importance of the beginning of the delivery. Rhythm and momentum building is something I've always taught. But, I started having a difficult time developing pelvic loading, complete hip rotation, glove arm action, maintaining posture and complete deceleration with my 14 year old brother. I didn't realize how important, and more importantly, how much what is done into the leg lift affects later movements in the delivery. I wish I would've known this 4 years ago, but stressing the importance of control and stability (balance) in the drive leg, hips and head into the leg lift, as well as controlling how the lift leg falls (direction), completely changes how effective the rest of the delivery can be. I’m over here trying to straighten up my brother’s posture, and trying to get him to keep his knee inside his foot through his stride, ignoring the fact that sways into his leg lift, which changes his stride direction as well as overcompensating later pulling his glove hard to make up for his poor direction; placing his arm in a stressful place and making deceleration difficult.
Moral of the story: Balance, control and stability of the entire body into and out of the leg lift will be the end result you get when you land and throw the ball. Be effective early and good things will happen later.