If Chelsea is able to finish in top4 this season I think it's going to be a great achievement for Enzo Maresca because his team didn't start very well this season but despite their inconsistent performance they have remained unchanged in their position which shows that they are doing everything possible to remain in the the top4. Manchester City is not in in their best form this season but seeing how they are coming closer to the top4 shows that Chelsea needs to be consistent if they want to retain their position but all I think Chelsea should do is to have a general check on the attack and defense they can't be scoring goals and conceding at the same time it doesn't show a good way of improvement. Manchester City can occupy the 4th position but I think Chelsea should fight to overcome Nottingham Forest who is in the 3rd place ahead of them with 4 points, if they can do this then it will be a great achievement for the team.
You are right. If Chelsea can qualify for the Champions League, it will be a big achievement for them. At the beginning of the season, Chelsea was outside the top 10 of the points table for a long time. We have seen very irregular and weak performances from Chelsea. However, at the moment, Chelsea is able to perform consistently well. And at the moment, Chelsea is fighting to be in the top four of the table.
However, I would say that Chelsea's performance needs to improve a little more if they want to keep their fourth place in the table. Manchester City, Newcastle and Bournemouth are fighting for the fourth place in the table. And these three teams are also in good form now. The team whose performance is the most stable among these four teams will be able to keep their fourth place in the table.