There's this odd premise at the heart of your comment which is that we are starting from zero again. "Replicated twice" is a weird way of saying keep playing the system we have for the last 10 months with incredible results.
28 games with it so far and 2.57 goals per game. Its not slowing down.
Pep didn't invent anything last season, he reverted to a system he's used for over a decade when it suits the squad he has. Aguero and Jesus were injured so it suited the squad so he used it. There is nothing stop gap about it.
"Underlying goalscoring issues" what are those exactly? Is it being top scorers 4 seasons in a row? Is it having goals from almost every postion on the pitch?
Or is it just trying to sound smart when you mean "occasionally we don't score" which is true for every team in history no matter how many strikers they have?
We scored in 36/38 games last season. 34 in 19/20, 36 in 18/19 and 36 in 17/18.
So I'm really struggling to work out what "underlying goalscoring problems" actually means as it doesn't seem to have anything to do with scoring goals.