I doubt Chelsea will have a good season
It is still early.
Lampard needs time to build a strong team again. Plus they can't buy players because of a case. Chelsea must always be ready for what happens in the future, and just look at the end of the season. Are your doubts true that Chelsea won't play well this season.
I think that their ban ends in the winter transfer window 2020. Thus they will be able to sign players then, right?
If they do, they will enforce their team with some additional power if it is needed. But right now I think that the team is a good one to compete in the championship title run. They probably need time to find the correct connection between them as they are a new team.