Even though Bayern Munich at this moment is not so perfect but still, in the end Bayern Munich will win the title and I have no doubts about that. Because as far as I remember in previous seasons also Bayern Munich sometimes got unsatisfactory results, but over time Bayern Munich will still get back on track in the title race. But if Bayern Munich fail this season, I'm sure the discussion is getting very wide about the sale of Lewandowski and the signing of Mane is likely to be a comparison that will be raised in the media at least in terms of their quality.
Bayern is a strongest team in Bundesliga and to beat them, it is a big challenge for all clubs there. This season, Bayern has been going through a transition with biggest change is from Lewandowski. The striker left Bayern to join Barcelona in a free transfer. However, Bayern prepared it by signing with Mane from Liverpool. So far, I can say Mane has played well in Bayern.
Other clubs have issues and they are not becoming stronger in this season. Just still the same or worse a little bit and this does not help them to beat Bayern even Bayern is not stronger than themselves in the previous season.
Currently, there is no team in the Bundesliga that even gives a good fight to Bayern Munich on a good day. Even though at this moment Bayern Munich is not doing very well. At least not at that level that everyone expects them to perform. But I am quite sure that they will be making a good comeback very soon and they will be able to get back to the first position at the table in no time. I really don't know if the other clubs are going to be able to give a good fight against Bayern Munich even though some of them are getting stronger.