He has a very basic game and understanding of the game. Top attackers are smart players, they are able to identify weaknesses and exploit them but at the top against top defenders you need to also be very clean from a technical standpoint that's how you get that extra second, that extra step in front of defenders. If we use players like Cavani, Muller or Schevchenko as examples neither are great technicians but they are clean, they have mastered the basics of football and have a great understanding of the game on top of it, they have great balance and excellent first touch/one touch football, don't ask them to dribble in tight space or spend too much time on the ball though. Lukaku is erratic he can do complicated things but will often fail with basics, he has poor balance and has failed to take advantage of his natural strength, his technical inconsistency and surprisingly athletic weakness means that while he has a genuinely great striking technique, he too often isn't in the ideal place and he is useless outside of striking the ball.