He was always better than what he showed here, people just love to write off players (see people like BBZ who quite happily write players off after about 2 games)
That said, if he continues in this vein, let Dortmund have him. Club gets a ‘decent’ fee, and can hopefully reinvest in another forward with attributes that suit the system, Dortmund get a player they want, Paco will presumably be happy with that too. Will hopefully smooth over relations with Dortmund too.