He was 4th in Ballon D'or young player voting. The attackers ahead of him were Guler and Yamal, who are obviously better. Doue and Barcola are and Estevao will be if he keeps it up.
That's right wingers in his age bracket. Assuming they mature at relatively similar rates they likely end up in the 10 best RWs at their peaks.
He was in the La Liga TOTY at 19 and our top assister at 20. He's out of form and getting booed by his own fans may not help him out of it. He may even leave. But if he shows anything like the Girona form for another team it'll be another Palmer, Soriano is not necessarily wrong.
He may not be great in your eyes but I'm more inclined to trust Pep, Viana, Txiki and Soriano.