I can’t recall if Lucasfilm made an official declaration when they relabeled the EU as Legends, but maybe that information should have been brought up in a more casual way. Some fans clearly took that as an attack or something. Lucas only briefly talked about the EU in some interviews, and it came to producing the films and Clone Wars, he just did what he wanted regardless if it contradicted the EU. Maybe Lucasfilm should’ve taken the same approach, and let the fans figure it out on their own!
In the article it brings up Lucasfilms actual statement on the EU and the canon and all it talked about was that in the stories they are going to make the only Star Wars material they must stay 100% true too are the Films and Clone Wars movie and show. It never said they were decanonizing the EU, it just said that everything from 2014 forward would hold the same validity in canon as the films and everything else COULD be rewritten. Not that it would be, but that I could be.