After PSG and Chelsea, I don't see Barcelona having any strong opponents to play with in the group stage, I believe Barcelona will still have an easy spot this season, Real Madrid continues to face Manchester City every season, UEFA should do better next season to prevent Real Madrid vs Manchester City from taking place because it now looks like a derby match between the two teams.
Don't write off any club in the Uefa Champions League they didn't get to the competition at random and while you can not see a quality squad in them it does not mean they can't completely make an upset. I was not happy with the early Manchester city and Real Madrid fixtures too, their meeting should have been a bit later than this.
That's right, history has proven time and time again that clubs that are underestimated because they may have been at the bottom of the table last season will not necessarily perform the same way as before. Anything can happen on the field. As i have said many times, the ball is round, and nothing is impossible if the opposing team plays with discipline and motivation. We don't know how hard their squad has been training to compete for this season's trophy.
Regarding the match between Real Madrid and Manchester City, it must be acknowledged that this is beyond expectations, as if they are meeting too soon. But this is what makes the competition even more exciting; there are many unpredictable things that can happen.