Your character simply moves left and right too quickly and very little skill is required to pull off some pretty crazy maneuvers.
I have noticed a lot of folks here complaining about either unresponsive controls or very quick or sharp turns & movements... what I have learned is that this is most noticeable after landing a jump, when you suddenly turn much more sharply than expected... and what I noticed is that this is probably due to the angle in which you're landing + the direction you're pressing on the left stick...
So, if when landing your character's board is angled 45% to the right, but you're also holding 'right' in the stick, your characters ends-up making a 90%+ sharp turn to the right... if I remember correctly, this was not as extreme in the original SSXs
What I've learned is to pay more attention to how my board is angled when landing, and to let go of the stick to keep the same direction/momentum of my landing (or just be more subtle)...
I'm not sure if I made myself clear, but that's the best way I have to describe this..