There are still some parts of it that are valuable. The photo gallery (which has been pretty much mirrored on Hirac Delest), the Anibase (which is still available and is also archived (I think) on the IWM), and the sample book chapters (I haven't tested whether these are gone or not).
That being said, I wonder what other kinds of new and better things they'll get to replace these? Maybe updated versions of a photo gallery (see all of the new cover art in one place, maybe new artwork of Andalites, Hork-Bajir, Yeerks, and other alien species that were never officially depicted), a new Anibase with new trivia on the creation of and stories behind the lenticular editions, and new samples of different chapters.