I don't think it's possible to get this Chelsea squad into the top 3 in 1 season. Chelsea's situation was very shaky. Performance was unstable. However, Pochettino did his best to strengthen the squad and bring stability to the performance. We saw an improvement in Chelsea's performance towards the end of the season. However, Chelsea could not qualify for the Champions League or the Europa League. Chelsea management might not have sacked Pochettino if Chelsea had qualified for the Europa League.
Whether or not Chelsea's new Enco will be able to strengthen this team is uncertain. But I would say Chelsea management should let the coach work independently and not change the coach in atleast 2 seasons. Changing the coach so quickly has such a bad effect on the performance of the players.
Here I agree, most chances if we have some stability again in this coming season then we can expect same result but having spot into top four is looking no realistic with now they are having many new young players which need to time to have better performance in these conditions which are never been easy for any player which is coming to play first time we are having too much hype about Enzo which is having first season at this level after having promotion through Leicester City.
Here I want to say if we have Pochettino for one more season then I have strong feeling there were good chances for the Chelsea to have spot into top four because he was doing good and having good improvement in quality of players with players were also having good confidence after having poor results in early games but sack of Pochettino is surely going to have huge impact on their chances for the Champions League in coming season.