The change in the format of the champions league this season, has provided an opportunity for more teams to shine and show their abilities, to be honest, from the beginning I saw if indeed the change in the format of the champions league was planned to tackle the big teams that often dominate so far, And we can see how many big teams currently have to face each other which ultimately reduces their chances of qualifying for the next round, in contrast to weak teams that actually benefit from the format change, so it is not surprising that previously Manchester City, Madrid, Munich and several other teams rejected and criticised the format change.
To be honest, I saw the new format as an advantage for big teams, because in my opinion, the more games they had, the more chances they had to secure a playoff spot. But in practice, it works differently, someone has a crisis, someone has a bad draw, and thus even strong teams can find themselves in a very bad position, when a few games before the end they have not yet secured a playoff spot.
Overall it's the same in my opinion, maybe just a little different and beneficial for some teams who get a slightly easier draw, moreover nothing, even for big teams it will be even more burdensome because they have to play 8 matches to be able to qualify for the last 16, that's more than the previous format.
For some big teams today such as Man City, Real Madrid and also Bayern, basically their team performance is having problems or is a little down this season and that also happens in the domestic league not because of the change in the Champion League format this season.