If it were Dortmund as the only team that has the strength to complete for the title against Bayern Munich I don't think the title will ever change hands any season. Dortmund has never for ones stay consistent for a whole season and if they have a chance of doing things right when it matters you see them dropping point like one of these clubs that are struggling go leave the relegation zone. For the top 4 I like the clubs I'm seeing and without Dortmund on the that picture shows how poor they have been, losing games without getting back at the top to show that they are among the big clubs fighting for the title.
I'm a bit disappointed at Leipzig because they did fight to win the league title from Bayern Munich back then and they too shouldn't be dropping point and struggling to stay consistent, on the other hand, Leverkusen I believe they will come back and with what they did last season is enough reason why we shouldn't count them out of the title race even if the point gap is a bit wide, they will come back and they're waiting for that opportunity to slide into the top 3 then losing and drawing games won't be part of them anymore, talking about Leverkusen.