I can't see Barca winning this game with this midfield. 2 of 3 are really slow, Rakitic barely moves to receive the ball, all of them are bad at receiving the ball under pressure (Busquets can do well, but lately only with Arthur on his side), only Busquets makes passes between the lines. Defensively, they can suffer with Lyon's speed.
So, if we have trouble moving the ball forward, people will complain that Messi is dropping deep to get the ball, as if he will receive the ball with those 3 in the midfield. That can lead to Suarez being alone on top, Dembele running alone on the wing and that's all.
I'm expecting a very difficult game if Lyon presses in our half, and if that happens, maybe we will see more long balls to Alba/Dembele.