I get he hasn't got a lot of creativity around him at us but even for Belgium against the top sides he struggles, and look at the players he has around him there! Hazard, de Bruyne, Mertens, Carrasco, Witsel etc. The thing with Lukaku, if you've got anything about you as a player or team, you can easily stop Lukaku. I agree his finishing ability is definitely is biggest and main attribute but the rest, his hold up play, touch and even his movement, isn't all that.
If/when he goes to Chelsea, you will see how effective the likes of Hazard, Pedro and Willian will be. It's why the likes of Costa, and Drogba before him, we're so good for Chelsea and their flair players. They were great at bringing them into play in dangerous areas. If you watch Costa closely or watch scouting videos of him and you'll see that his off the ball movement and play is very underrated and a big plus for the games of the likes of Hazard and Pedro. This is the side of the game where Lukaku is lacking and imo it's going to be an issue initially for Chelsea.