I don't know why Aaeru doesn't come around anymore, all the drama happened before I joined. She has really extreme opinions on copyrights (as in they shouldn't exist, at all). MG basically offered to work with her to get her fan translation released officially, like they did with Cartagra and Imouto Paradise, but I believe her views on copyright creeped in and wouldn't come to any agreement with MG because of that.
As for DC3, yes, all that was added in that version was the Aoi route. I don't know exactly what those "episodes" are but if I was to guess, they're short side-stories. Keep in mind that DC3 is relatively recent. Who knows, maybe they'll add more content to it in the future.