Lukaku won’t win games alone but even against the top teams he’ll get in behind the defenses, dominate aerially and be clinical. I don’t really like him as a player but he’s effective.
I still don’t see Morata or Lukaku as great strikers of the ball, they compensate for it in other ways. Lacazette hits the ball far sweeter, that doesn’t make him better all round ofcourse, he doesn’t have their pace or power or aerial ability.
Another reservation I had about Morata was his goalscoring record for Juve and the fact many of his goals were off the bench for a heavily overpowered Real.