I don’t think he’ll gain much speed, if any. Just before covid we had a retired sprinter come in and work with the youths for a few sessions, mainly body shape and motions while in movement. After a certain point and age the gains become fairly tiny. It’s something they’ll have been doing with Ferguson plenty. With some teens there might be a question of growing into their frame, but not so much with this guy, he’s already fairly comfortable pinning PL defenders.
You can tell he’s been really well coached, despite his size his agility in attacking areas, especially when receiving the ball, is excellent. The speed in which he gets his shots off is top notch. He can also press up against the defender and lay it off, consistently finding his man. Doesn’t look like much, but it’s very hard to do in those crowded central areas. When you add in that he’s comfortable dropping deep as well as making runs in behind (with clever movement too) he’s a really well rounded young talent.