Absolutely flawless so far in the CL and Pokal but second from bottom and in the relegation zone in the Bundesliga.
To sum up the season so far, I think this gif captures my thoughts about it pretty nicely:
Decent summary there Azul. I can't believe that in just 3-4 years Borussia went from a dominant force in the Bundesliga to a team that's fighting for relegation and winless in 6 games. And with more or less the same group of players too.
I think some things have to be considered in what's led to such a downfall.
The team constantly has to fend off the hungry vultures of European football and loses at least one key player every summer (Kagawa and Sahin have come back for example, but they're not what they used to be it has to be said). Any team would suffer a drop in quality when they lose their best players on an annual basis.
Another important factor is the amount of injury problems the squad has had to encounter the last two or three seasons which has disrupted any hope of building a rhythm or consistency with players constantly in and out of the side. This has become a normal occurrence in modern day football though, especially with teams who play such a demanding style of football and put so much success down to an effective intensive pressing strategy. All the coaches who apply this method to their teams tend to suffer these problems at some point because of the wear and tear that's built up over years of playing such a way and at such a physically demanding level with games being played every 3 days, this is a problem the likes of Guardiola and van Gaal's teams suffer too.
Lastly, and I've brought this one up many times already, most of the teams in Germany are accustomed to Dortmund's style now and know exactly how to beat them. Defending deep and in an organized manner, hitting long balls and pressing high up the pitch to initiate counters is the way to go against this team because Dortmund are so bland when it comes down to having to create chances with possession based football or 'make the play' as some would say. It's first and foremost a counter attacking team which is what all the success was built upon, when they are unable to play that style they struggle and Klopp has always been too stubborn to change his ways or introduce a real alternative approach when Plan A doesn't work and as long as that's the case, I predict that Dortmund will continue to struggle domestically for some time under his management.
This season has been a calamity so far in the league, if things don't pick up pace soon and the distance from 4th place increases, it could really hurt the development and progression of the team for the foreseeable future and it might mean some big sacrifices need to be taken in order for the team to improve and return to its old level once again. What that means I'm not sure exactly on right now, but something will have to change if things don't improve soon.