There are a lot of pleas on PPRuNe for services to Germany, but few airports can sustain them. There are good reasons for this:
1. Germany is not a massive tourist destination
2. There is little VFR traffic
3. Whereas UK is very London-centric, Germany has a number of mid-sized cities (Munich, Berlin, Cologne, Hamburg, Frankfurt, Stuttgart, etc), and Germany's economy is more geographically spread.
4. Internal transport in Germany is good, with free widespread autobahns and good fast rail.