Pokoj,
In terms of the German programming that NexTV offers, I have to agree with you that ZDF is really the only channel that I watch. I have never been very enthusiastic about German commercial television. In the end, the German commercial channels are not any better than the garbage on American commercial TV.
The public channels (öffentlich-rechtlich) ARD, ZDF, and the regional "dritte Programme" (WDR, MDR, etc.) offer a completlely different level of quality of programming over the commercial stations. It is those public channels that I miss most from the OverseaTV lineup. Come to think of it, with the exception of DSF, OverseaTV's lineup was all public channels.
As I have stated previously, I hope that as a minimum NexTV adds ARD (Das Erste).
Gruß