Wide players blow hot and cold. It's how it is unfortunately. Traore has been iffy as well as brilliant. Trezeguet was very average last season, until project restart and he was nearly unplayable. He's regressed a bit, but hopefully he can get back to the end of last season. Grealish has been poor some games this also.
El Ghazi has scored 6 goals this season, including some crucial ones. When he's on, he feels like he's Ronaldo, when he isn't, he's Ali Dia.