Barcelona shouldn't be in the list because they're struggling to fit into the system of balance. Pep Guardiola is my own favorite coach, he's important and makes football enjoyable because he's always on the top followed by Real Madrid. A club's level is determined by the performance exhibited by the club and their players. Manchester City remained first because their key players have returned to training, remember Kelvin De Bruyne is back and have scored and aissts for his team unlike some players that have no contribution to the growth of their club.
I agree with you on this, Barcelona should be excluded from the list because they are inconsistent at the moment struggling to win matches and compared to other teams they are matches are not as enjoyable as other teams in the list.
A teams level is determined it’s performance as you stated and that’s why I would disagree with you about Manchester City remaining first, don’t rate them based on past performance, to be sincere Manchester City are lacking behind Real Madrid and Inter Milan at the moment. I so much enjoy the energy and mentality Inter Milan approach a match with and so far this season they have been more clinical in the attack so they can’t be underrated this season.