I agree with (LA

) chargerfan saying ask players.
That said, most kids probably won't tell you that managing their parents maybe one of the biggest obstacles.
After seeing my older kid age out this year and younger now U16, from U6 days, three key things jump out at me. I have rarely seen a player that can do these three things.
1) 1st touch on the ball, especially in traffic/crowded small space, regardless of how the ball gets there (e.g., on the ground, in the air, hard or easy). Vast majority of turnover or missed opportunity occurs because the touch is poor. Its a vital part of being technical player.
2) movement without the ball for most player is pedestrian and average. It a team sport and movement without the ball can be vital to the success of the game. Some are design to drag the defender with you to create space for someone else, or increase probability of successful pass, or simply making a run at the right time and the angle for attacking or defending.
3) Mental toughness and smart field awareness. Its all psychological and soccer IQ.
I think we focus too much on shooting and passing and just pressuring for the sake of pressuring the opponent. Just playing brut force method and not playing really smart.