The thing I like about Ojo now is the development he's showing in terms of movement off the ball, as well the improved tempo in his game. He's now moving the ball quickly instead of having a cuddle with it, and being more distinct when he decides to go at the defender.
But the big thing is his movement without the ball, especially making runs in behind the defence. This is absolutely vital if you want to play as a winger in this Liverpool team, and at top level in general I guess. Wingers who only affect the game with the ball are basically useless, unless they have extreme on-ball qualities. And Ojo did really well here against Tranmere. Really showing some clear signs of development that potentially makes him an interesting option as the 3rd/4th winger in the squad.
This is something Ryan Kent needs to learn as well. He's pretty good when he has the ball, but not really doing much without it.