The third tell tale sign that a clean or snatch needs some attention is through excessive lateral displacement of the feet during the catch. Or as I like to call it, the Starfish.
Olympic lifts are great for developing lower body power. Many athletes will lose a large part of this opportunity to develop the lower body drive by never fully extending the hips and basically jumping from the ankle and then pulling with the upper body, never 'getting out of' their hips.
Athletes, are you taking responsibility for your own development, or are you relying on external factors? What tools and processes have you put in place to make sure your are maximizing you performance and recovery?
"It'll stunt their growth," "only do bodyweight," "they will get hurt!" Ultimately whether or not to incorporate traditional 'resistance' training depends on the individuals emotional maturity, NOT biology.