Man City are probably the best club in Europe right now, but don't forget how they only managed to push Arsenal out of first place at the end of last season... So there are strong clubs in the EPL now too... I think that next season Man City will not be as easy as last season and I don't rule out the possibility that they won't be able to win again...
You can’t say they are the best club in the world but rather it’s safe to say they are the best club in England currently since they are have been dominating the league for a while now. Every year it’s getting harder for them to win the league and last season they were so lucky to have won it and it was all because Arsenal showed a bit of inconsistency towards the end of the season. Next season will even be tougher for them, All teams who were out of form last season are already building a competitive team, Chelsea and Liverpool have signed a couple of players to help improve their squad in preparation for next season. We have Arsenal, Chelsea, Liverpool Manchester United all ready to challenge for the title next season.
A trophy in Champions League last season can be a good start for them to be recognized as a big club in Europe but they are far to be a best club or a dominating club in Champions League. They don't have such tremendous history like Real Madrid and they have yet won some Champions League in a row.
To be recognized as a top club in the champions league takes more than just winning the trophy once, you must be consistent for a couple of seasons in the league at least even if you don’t end up winning the trophy you should always be a runner up in the final, say like in 5 seasons you won the trophy 3 times and then at least make it to the final 4 or 3 times in 5 seasons. Manchester City are far from dominating the champions league, it’s just their first champions league trophy in history so they need to be consistent and win it multiple times in a row to be regarded as the best just like Real Madrid.
They can do it, starting from the last season, and will achieve it if they continue to succeed in Champions League next few years. We have to wait for their sustainable success in Champions League to conclude they are a dominating club in the last 5 years or 10 years. They have years to come to that recognition which is not easily to achieve.
I don’t even think they will be up to the task to achieve that feat. I believe guardiola is the secret to their success and once he leaves the team they will become an Ordinary big team from England. I’m sure guardiola won’t spend up to 3 seasons with them again.