The hope is like that and indeed they must continue to try better so that the criticism that has been directed at Chelsea turns into praise because in the end they also realize that if they don't change then this will only make Chelsea suffer more.
At least the last 2 win in the EFL and EPL in the last 2 weeks make them more confident besides, seeing them compete last week against Fulham, Poche should know that the 4-3-3 formation is good to be used as a formation choice instead of forcing with 4-2-3-1 which even though it is good for midfield but difficult to finishing.
Chelsea won previously against Fulham and of course that will make them more confident for the next match. This week Chelsea will face a team with a low ranking in the standings, this will certainly be an easy match for them to maintain their performance. However, situations are sometimes difficult to predict because their performance is sometimes unstable, making Chelsea fail to maintain their winning streak. Burnley are not a strong team this season because they have been so bad at the start of this season.
Pochettino must be able to maximize his team's strengths as best as possible to be able to steal full points at home to Burnley. Yes, I prefer the 4-3-3 formation because it can maximize their play in attacking or defensive strategies. But it's up to Pochettino because he really understands the character of his new players this season so a good strategy is one that is easy for his players to understand.