I hope that Lampard can bring change to Chelsea, especially against Madrid, of course there is a lot to be prepared, especially overhauling and organizing better tactics, yes, even though I know it is difficult to make Chelsea in a short time better than before, but hopefully Lampard knows how way of making it even better because he had previously managed Chelsea before. 
Your hope was not even coming true. Chelsea faces another lose again in the domestic league. The winner for the first leg can be determined easily. Chelsea is a mediocre club right now after it changed hands. No body may bet on chelsea at this moment. The gap to the real madrid is too big. Chelsea will become a team that will be destroyed by real madrid in this match. It doesn't have good striker and its players are also playing like amateur football players.
chelsea is now having a mentality issue. This is also the main problem that will never be fixed if chelsea didn't get a good coach that will able to handle the club properly.
Lampard is failing right now. i don't even wanna try to hear any bad results from him anymore, 1 match is more than enough to know what's gonna happen next.
I mean if Ted Lasso was real, I would say that they really need him to begin with and that would be awesome, because they can get the tactics from some assistant manager, they need someone who could make everyone want to win again and play the best football they know they can play.