Kid owns the groomers; he rips.
Park n' riding like that can be addictive. There's rhythm, a state of flow. However, when the terrain steepens, that style of skiing is limiting. The state of flow is broken; it's interrupted. It's evident in the 11-year old video: he may have linked just 3 turns on the steeps. On steep slopes, he's merely surviving: traversing the slope, picking spots where he can execute those wider-radius turns. Kid should learn how to make short and medium-radius turns. General comment/ reinforcing what everyone else said.
Also, it's pretty cool to have a Dad as supportive and enthusiastic as you seem. I can definitely sense that you guys have a good relationship on the slopes. Mixing coaching with personal relationships can be toxic; you can usually smell it a mile away. Not a whiff of that from you guys. All I feel coming from you is pride and joy. It's awesome. I'm happy you guys can share your love for skiing like that.