It’s a bit of both, I reckon. Tkixi recruits pretty well nowadays and Pep improves players.Sorry - I thought it was clear from the "first Summer had Nolito and Bravo", and the "six seasons" that I was talking about under Pep, but realise I didn't actually say that.
Clearly we have a huge list of poor transfers before that date, which makes it more remarkable. Obviously recruitment could have improved, but I'd suggest Guardiola can make good players work for him.