This gap would have increased even more if Liverpool had given their full effort to win the last 4 matches. After securing the Premier League title, Liverpool gave their full effort to win the following matches. Liverpool secured the title long before the end of the season.
You're right but since they finally succeeded in getting that which they were struggling for even before the final day of the season, of course they had to take it easy so as to avoid injuries. And this also happens to other teams in different leagues, once it is announced in the early stage that this is the title owner, I noticed that such team will no longer be consistent as they used to. Because they knew that with the gap they're giving other teams and also the number of matches left they're unstoppable.
However, we will not see such a scenario next season. City is trying to increase their strength
Me too, I feel like alot of teams would want to make some correction in those faulty areas to enable them do better by next season. And yes, we may likely see premier league working differently by next season.