It’s a bit odd to say “why don’t they sign someone, essentially, better” without offering any alternative. Which player of comparable talent was available that would have no issues adapting to Pep’s system from the get-go?Someone already playing the kind of selfless, less individualistic football Pep wants in his midfielders. It'd be the scouting department's job to say whom, but it's odd when spending so much to then get a player who needs to be rebuilt from scratch.
Whether it works out down the road - which it might - isn't what I'd query, unless we're saying all Pep signings must take a season to be assimilated, which would be a different discussion.
He was looking for a player that was offering a completely different skill-set than his other, already available options. He’s got one. Whenever he will adapt or not is another question, but, considering a very apparent trend with Pep’s signings, it’s not that unlikely that we’ll see a completely different player next season.