That's how I feel. Zaza isn't much better than a Mattia Destro or Pavoletti. You could sign a player from Serie A and fill his shoes from <10 million and then use some of the Morata funds + 30 million from Zaza to buy a top end striker.
Pavoletti as a 5th striker? sign me up:
https://www.whoscored.com/Players/95822
15 goals in all competitions this year. He is an extremely strong finisher, very strong in the air, good at set pieces, and actually not that slow.
We focus so much on strikers from other competitions without taking a look at what is available in Serie A. As a reserve guy, Pavoletti would be ideal.