This season I still consider Bayer Leverkusen as a strong candidate for the title but the path will be different, meaning they will not be able to run smoothly like last season. The defeat from Leipzig is proof that other Bundesliga teams have also made changes to their squads so that this season's competition is no longer dominated by just one team. What about Bayern who were previously not considered at all because they were commanded by Kompany? but in reality he was able to manage the team well. I agree that at the beginning of this season it will not guarantee until the end of the season but at least we already know what each team's picture is like this season.
Every team does make changes in each season even though the changes are not too big but it is possible that the effect obtained by the team will be greater like what Leipzig did when they visited Bayer Leverkusen's headquarters. However, I also still consider Bayer Leverkusen as a team that will compete for the title this season again in the Bundesliga, although it is true as you said that the path will not be as smooth as last season because other teams are also trying to win every match so unexpected things can happen like what Leverkusen experienced when hosting Leipzig.