This RB is insane!! His pace and his defensive stats are amazing. I played with Cancelo, Walker and Lala, and Mbabu is better than these. To talk about his stats in game, especially his pace(acceleration and sprint speed), his stamina and the sliding and standing tacke are so good. Also his combination of strength, composure and balance are ok. I think that you shouldn't shoot with Mbabu, and in my opinion, his passing is good.
In conclusion, if you have 40K, you don't have to leave this RB!!!
Physically ->Stamina, Strength+Balance+Composure, Jumping(with Backbone Chem),
Defense -> Sliding and Standing Tackle and Interceptions
Passing ->Short Passing and Crossing
Shooting, and some of Dribbling's stats(Dribbling and Reactions)