Barcola was Liverpool's deadline-day statement. He can eat up open grass and carry an attack towards goal before defenders are facing the right direction, precisely the sort of chaos Iraola enjoys creating.
For now, the Frenchman is feeling his way through a new league and an unfamiliar front line. Early performances have contained sharp runs without a consistent final action. Liverpool paid for what he can become across a season, not simply what he could deliver in his first few appearances.
Victor Muñoz brings another type of threat. He can play from either side, works without the ball and attacks space directly. His energy makes sense in Iraola's press, especially when the coach wants the front line to force hurried passes.
Federico Chiesa and Gakpo add further combinations. The options look deep on paper; the task is turning them into a settled pecking order without making anybody feel that one quiet match will remove them from the side.
Liverpool need width for more than appearance. Stretching the back four opens the central channel for Wirtz, Szoboszlai and Isak. When the wingers move inside too early, the pitch becomes crowded and the attack easier to contain.