What new content are you talking about if the EA says "only the first act is available"?
I can say that they have added new companion cut scenes and dialogs. For example, Astarion with a book, Lae's dialogue about tears, Gale's romantic scene, Astarion's romantic scene (now cut out again). Maybe more, but they don't write about such things in the posts, I find it myself. New content that you can expect in EA: new classes, companions, cutscenes, dialogues with NPCs, quests. But no one promised you that.
So, three months ago, they gave you a new class, which is not bad.
