for Dortmund it seems that there is only a small possibility of improving the quality of its performance this season and will hardly even be a challenger to Bayern Munich until the end of this season. It all started with the sale of talented player, currently no one has filled the void with equivalent players except in the middle of season Dortmund was surprisingly able to develop several players with new talents after which they increased drastically. but it will be very difficult if you look at the players they got from market this season, it seems like the more equal challenger is Leverkusen.
Agree with you, seems Dortmund have small possibilities will compete Bayern Munich for domestic league tittle race and I see with other team from Bayern Leverkusen and RB Leipzig have bigger potential keep forward for winning domestic league. Dortmund have loss 2 of 4 matches and Leipzig only have one loss then Bayern Leverkusen still unbeaten after success get one points away match against Bayern Leverkusen. I think for this season seems Bayern Munich have compete team Leverkusen and RB Leipzig for winning domestic league tittle, Dortmund have bad tradition on every years because they sold star player and can't find the same level qualities for replacing their player sold, still have opportunity with Dortmund active on next window transfer and sign potential player for fighting in tittle race with Bayern Munich, Leverkusen and Leipzig.