According to this article (in German only - sorry) which is usually a reliable source.
The reason beeing that they increase their own frequencies and thus do not need EW any more for connecting traffic.
https://abouttravel.ch/reisebranche/...rg-fluege-auf/
What are your thougths of this? Does EW not meet LX standards? It is quite strange that they would no co-operate given they are fully owned by Lufthansa...