I was waiting for that answer: this is a new team.
But if Croatia wins and they play again in 2 Months, people will answer the same: this is a new team, new match and we learned from our mistakes. Argentina is now a favorite.
And repeat the same till the end of time, that's how it works.
For comparison, look at Barca:
5-6 coaches in the last few years, we signed 15-20 new players, but deep down, that is the same team with same tactics, same bad mentality and same results, isn't it?
Spain after 2012: different coaches, different players, but deep down they always play in the same way.
England, each World cup = new team, a new coach. In the end = it is always the same England with a similar type of play, similar mentality, similar mistakes, similar results. Isn't it?
Players, countries have similar traits, values, flaws, how they handle pressure, how they lose nerves.