Beier at Dortmund is indeed a good step and it is an improvement. I don't know for sure if Dortmund is doing business or if they are indeed aiming for the championship next season. But indeed Dortmund is always good at bringing in young players then they are made better and sell more expensive.
For sure for getting Beier to Dortmund is an big improvement for both the player and Dortmund with his talent.
With all that very nice and good transfers that Dortmund has done this year and for the coming season it would be a shame for not aiming for the championship.
Even they have made a lot of good young players very good and got them sold for good money at some stage there will come the time for getting a title.
Fingers crossed maybe they can make it this time.