Running: it made more sense to me last year. If I held the sprint button I would get one speed and if I tapped it I would get the little knock on happening. I've tried that this year and it seems more random. The long knock on sometimes works and sometimes doesn't. And I can't work out when it uses bursts or when it doesn't lol.
I assume you mean dribbling with the ball? Noticed that players with better dribbling skills/speed do this more naturally and easier compared to the average joe