Bergvall is so slow, slower than most players in Allsvenskan. He also likes to take his time with the ball, which slows down the play, and his actions typically lack pace. Even his passes are slow. Typically short passes sideways. Doesn't seem to have much of a shot and his overall game is very horisontal rather than vertical.
He must have one of the best agents in the world because how both Barca and Tottenham competing for his signature is just nonsense. In the Premier League, pace is so important, I don't really see him ever become a top player.