I started playing this a few days ago and I'm completely terrible (or pro players are magical hackers who have antigravity enabled) but it's so much fun
As I mentioned above, I'm a complete novice but yeah it works fantastically. What helped me out massively was mapping the side dodges to the two underside triggers. If you map each of them to L/R stick and A, and set it to turbo mode, hitting either will do the side roll. It's more intuitive than doing left stick and double tap manually. You can also do forward/back rolls by using the stick yourself to override the direction and still using the triggers.
I'm not doing too bad but I'm hopeless when the ball is in the air above me, or when the ball is up against the walls either side of the goals. There I just flop about like a fish while people do mid air 360 noscope tricks. I was on a team that lost 9-0 last night. No quitting though because I'm not a coward.