That's a good summary of the German situation, LGS6753.
There are English regional airports with more scheduled German connections than BRS's sole Berlin that overall handle fewer passengers - in one or two cases considerably fewer - though I realise there may be specific reasons why this is so.
It can be fairly argued that the German routes BRS has had in the past never stuck though some did for the best part of a decade - BA franchise to Frankfurt and Munich for example until BACon was bought by Flybe in 2007 - and the LH route to FRA in 2008 was building well (nearly 100,000 passengers in the 13 months of its existence at fares that were often expensive - there were complaints about the cost on PPRuNe and elswhere) until the recession brought it to an end.
Taking into account your entirely realistic description of Germany there are still grounds for optimism that the very able BRS management team will be able to achieve another German link in the near future unless of course the economy goes into reverse gear at high speed. They were very close to getting something for 2012.