Since there is no big change in Chelsea squad, I also doubt that Chelsea will have a better performance in the next season. Chelsea needs to rebuild their attacking line if they are serious to improve their performance. So far, Cheslea can't sign a top striker, they are only rumored to sign a top striker. The current strikers of Chelsea are not really productive, they rarely scored during the last season.
Liverpool seems a bit better, they still have a good squad although they failed to perform at their best in the last season. If Liverpool can sign a top striker in the current transfer window, they surely may have a chance to perform well in the next season. Well, they have enough wingers, but they only have Nunez in the CF position. So, I agree that they need a CF (striker) now.
Chelsea have already endured too many defeats and humiliations in league games this season, and I doubt they will be able to perform at their best next season. Looking at the club's current squad, I don't believe they are serious about winning, yet it is only a matter of time before the club regains their form. Mauricio Pochettino is the new manager, and fans should give him a chance to understand what his presence means for the club. Chelsea's problem is simple inconsistency; the Blues need to recruit more players who are serious about playing high-level football.