First as everyone has said, great skiing, but you have a lot of work to get where you want to be.
Technical: You are getting variations in your stance width through transition, this tells me you are out of balance and unable to release effectively. This is because you are pushing at the finish to shape the bottom of your turns. This put you back and inside and unable to release the ski from a balanced position. It also reduces the amount of absorption you have in your legs, causing you to get kicked around a bit bit the terrain. It is better on the groomed short turns and the middle bump section but the move is still there. Allow your feet to come out form underneath you more through the apex of the turn. Also think about edging the ski before turn the ski as well as bending the front of the ski to shape the top of the turn rather than turning your feet. This will build bigger edge angles into the apex which in turn will build pressure earlier, and allow you to stay balanced for/aft. This will give your turns the snap and flow you are looking for while maintaining a consistent stance width because you are balanced through the whole turn.
Tactical: You are letting the terrain dictate where you turn and turn shape. You should be able to maintain a consistent turn radius regardless of the terrain in front of you. This is the ultimate goal. Practice by picking a radius and sticking with it throughout the entire run. Better yet have someone else pick the radius. Then move to a variation where you do 3 turns and switch the radius, another 3 and switch again. This will show you where your weaknesses are and what your go to moves are. At this level any variation in line or radius should be by choice not because terrain dictates it.