In addition, if for example the English league format is changed to 18 teams, I think it will have a pretty good impact. Because as you said, the competition will be even tighter. And big teams can also be relegated if the format is like that. Because the proof is that currently Tottenham and Manchester United are in 17th and 15th positions. So hopefully this format can really be applied in the English league.
The Premier League is very competitive. Is there any need to change the format of the Premier League? I personally think there is no need.
But you are right that if the format is changed, then there is a possibility of big teams falling into the relegation zone. This season we have seen giant teams like Tottenham and Manchester United perform badly. United were in 15th place in the points table and Tottenham were in 17th place.
This season the teams fought hard to qualify for the Champions League. Next season teams like United, Tottenham and West Ham will have to strengthen their squads. These three teams have performed very badly this season.