And who was his manager in the 18/19 season?He's 27, not some prospect. In his entire career he's scored more than 10 goals in a season twice, once in the Spanish second division when he was a kid and 12 goals for Newcastle in 18/19. There is nothing there to support the idea that he will ever be a top level goalscorer.
If he could get back around the 10-12 league goals mark and chip in with a few assists that would have to be considered a good signing.