This book is a reference grammar on the modern Europaio language system. It is not a textbook on Comparative Indo-European Linguistics, nor is it some kind of scholar publication. It is indeed not intended for IE scholars or students wanting to have a thorough approach to the Indo-European languages or to the Proto-Indo-European.
It is not The definite Grammar, either. In fact, this is the first volume to be published, and only deals with the Europaio Morphology, leaving Word Formation and Syntax issues for the second volume. If you want to follow (or participate in) the newest developments made by Dnghu and the other institutions conforming the Europaio consortium, they will be posted on Dnghu's and Europaio's web sites.