Coleman uses to be quick, he's lost more than a yard of pace. In fact, he's completely finished if we're being brutally honest, as much as I've loved him as a player.
Digne isn't that quick, same as Baines. Not what his outstanding attribute is.
DCL and to a lesser extent Richarlison are somewhat fast but in terms of transitioning the ball up the field they can't really use that trait to contribute other than via the long ball.
King doesn't play, Mina is slightly above average in terms of pace but mostly just looks quick with his mad sprinting action, and Holgate is average.
We have relatively slow full backs and a horrendously slow midfield. Perfect signings for me would be Aarons and Saint-Maximin, although one of those is obviously impossible.