I think every team in the Champions League needs to follow Manchester City. Teams should think about what kind of tactics Man City is applying. I hope the rest of the teams will perform well this season. I want the Premier League to become more competitive.
Last season the Premier League also looked more competitive in my opinion, because Manchester City was really consistent in chasing Arsenal points last season. And it is likely that next season Manchester City will still be very strong even though other teams are also making better changes so they can make it difficult for Manchester City. But if other teams follow the tactics developed by Manchester City, it will actually make the other team weaker because it will be easier for Manchester City to find the key when making their attacks.
I wouldn't say last season was competitive. Because last season only Arsenal and Manchester City fought for the title. Big teams like Liverpool, Chelsea, and Manchester United do not fight for the syrup. They were far behind. Liverpool failed to qualify for the Champions League. On the other hand, the Chelsea team was outside the top 10 of the points table.
However, it is expected that the next season will be more competitive. Arsenal, Manchester United, and Liverpool are further tweaking their squads. They are trying to build a strong squad. And so we may not see the dominance of any particular team in the coming season.