We could also be seeing many more "thrashings" as the top teams face weaker opposition.
Then we have this from Wikipedia: Another criticism of the new format is that with 3-team groups, the risk of collusion between the two teams playing in the last round will increase compared with 4-team groups (where simultaneous kick-offs have been employed). One suggestion by President Infantino is that group matches that end in draws will be decided by penalty shootouts.
End quote. I find it quite shocking that the new format was seemingly introduced in the absence of any definitive solution to this problem - quite apart from the fact that the suggested solution would only work with drawn games. It wouldn't work in the following scenario:
Team 1 beats Team 2
Team 2 beats Team 3
Team 3 beats Team 1, and all teams finish with the same number of goals scored.
The only possible solution I can see is to play three more matches to separate them!