Dortmund was really a good team and always did good seasons and make troubles for Bayern München but in the last year's they really lost their prestige, the team always fail to keep their good players and that's the bad point about Dortmund
The bad points in the past that have befallen the Dortmund team seem to have been lost this season although it still looks very early to say that now. But I think that this season Dortmund have started to improve their slump and have also started to build the ambition to get a win in every game.
I think the Bundesliga is still good and not boring because you have to see the game from Union Berlin which is getting better and being able to maintain its position is quite good, because not all teams can do that, at least it is a good development from union berlin.
This season is no longer boring because it has been colored by several other teams at the top of the standings such as Union Berlin, who have performed well so far and have also started to make Ayern Munich a little troublesome against them (Union Berlin). And it would be even better if there were two teams who were able to make consistency from now until the end of the season so that everyone could see the presence of fierceness in every competition.