Once the first World Cup has finished, I'd like to suggest one possible minor improvement for the next international tournaments.
The World Cup has taken 7 weeks. I think that's a lot of time in the game because:
1. The schedule of the season is almost full (as we know, the finals of the Continental Leagues had to be postponed)
2. In real life the World Cup takes 1 month.
So I suggest that the first 2 matches of the group stage could be played the same day (one in the morning, one in the evening). And the third match of the group stage could be played the same day as the round of the best 16. And even the quarterfinals and the semifinals could be played the same day.
In this way you can reduce the number of weeks of the WC and avoid some problems with overlapping competitions (league's play-offs) and, what's more important, I think it emphasises the concept of team. In this WC, with 1 game per day, (in general terms) it was easy to recover players from one match to the next one. In real life it's not so easy and the team, as a whole, becomes more important as more players have to play matches; otherwise, players would be exhausted before the finals.
Anyway, regardless of the number of weeks (a minor detail, as I sayd), I think the WC (and the Continental Champs too) is a great tournament and a huge improvement for the game!