I think Pulisic would have given Croatia hands-down the best midfield in the World Cup, with Modric and Rakatic. That midfield would give France a lot more problems than Croatia’s present midfield. All three of them are very capable on the attack. Rakatic doesn’t go forward that much for Barcelona, but he picks the right times to do it: He scores the first goal against Juventus in the Champions League final four years ago and he has scored the first goal in two El Clasicos against Real Madrid. Pulisic’s offensive ability would give both he and Modric more open space.
I don’t know if it still would be enough for them to win. I think France’s speed will be too much for them, especially since both of Croatia’s outside backs are mediocre.