Yes, maybe Chelsea can make a surprise next season, I think they might have the chance to be in 3rd or 4th place because the new Chelsea coach is very experienced in premier league. But to win this league, I doubt it. Because we still have Manchester City which has a higher chance at there, they are unstoppable in last season and maybe they can do it again next. Although it's too early to say that.
Everyone will definitely look forward to Chelsea's performance next season with a new coach and also the selection of players who are more competent to fill regular places in every match. I think it's true if Chelsea will return to the top 4 because they will make every effort so that next season the same mistakes are not repeated. Even so if competing for the EPL title it is still quite far from the current squad building mission and I think Chelsea will be able to achieve that after the next 2 or 3 seasons.
Manchester city is indeed the only team that has been very consistent so far and they certainly want to defend the EPL title they have won this season and as long as Pep Guardiola is at Manchester City, I think the dream of other teams to beat Manchester City from the EPL title race will vanish.