Time? I don't think these top players need time to adapt at all. They adapt immediately. Individually they are good, I believe but it is the coach's fault because they have only one pattern of play which doesn't work against big teams. Pass, pass, pass till you get inside the box and score. They have tough times playing such against team with good defense. They can only get through Mallorca, Getafe, Cadiz and so on.
If Barcelona play Newcastle, Newcastle will either win or draw. 😆
Painfully, i can't deny or counter this.