One major weakness especially for beginning lifters is standing the weight up after its been cleaned or snatched, when in all reality standing the weight up should be the easy part. One great way to get strong and comfortable in that deep bottom position is to pause in the bottom of your squat to practice moving weight from a dead position without the stretch reflex of bouncing. It's also important, at least in my opinion, to remember that to get comfortable moving heavy loads from deep ranges of movement, you must challenge yourself to lift heavy weights from those deep positions frequently.
Exercise: 8x1 Pause Front Squat (three second pause in the bottom)