I know for most people this is a simple transfer which really strengths our rivals, but I do not think it is that straight forward.
Pep has a system and it is the players who have to fit into it, rather than the other way round. Now i am certain there are many expert mind who have already concluded that Haaland will fit into the system, but its never really that straight forward. Just look what is happening to Grealish. I do not mean to say that he is a flop, but he will take time to fit into this system and may or may not shine this season. I think same applies for Erling. Also, he will have to score, otherwise the press will have a field day.
As much as I like a striker to flourish and bang in goals left right center, this wont be as simple as some think.