Don't expect similar performance from Liverpool next season because they're not the only club in EPL. I don't think that any club can do what City did. Other clubs will also tighten and strengthen up their team by bringing in new players. I might be wrong but I don't see it coming. City is getting strong and Arsenal is also there to be in competition with Liverpool.
What you said certainly makes a little sense because in every season all teams that have money will continue to spend the best players to improve their team's strength so they can compete with all rivals in the Premier League. I also agree with what you said that teams like Manchester City and Arsenal will still be quite difficult opponents for all other teams next season, not to mention if there are surprises from teams other than them such as Newcastle and Nottingham Forest. So clearly there is no certainty that Liverpool will be much better than this season in the Premier League next season.
Predicting next season is indeed difficult if the league is not over. Indeed, for now if asked to choose a strong and solid team, Liverpool is the favorite. But at the end of the season there will be many unexpected events, especially with the opening of the player transfer market, of course speculation about the team will be different.
But what is certain is that Liverpool will try their best next season to appear stronger, besides wanting to defend their EPL trophy, of course they are also very ambitious to appear more optimally in the champions league. Man city and Arsenal will certainly remain the main competitors, maybe Chelsea will also be a competitor next season because their game is slowly starting to solidify and the coach seems to have found chemistry. It is interesting to wait for next season, will Man United be able to compete in the EPL under AMorim's guidance?