I downloaded Eclipse Oxygen RC2 to play around with. The first thing I tried was to use Buildship to import my multi-project Gradle tree. When with import wizard gets to the “Import Preview” step the “Gradle project structure” view shows just one project (the root) and if I let it proceed I end up with just one Eclipse project in the workspace. The project is not even a Java project.
This all works fine in Neon.3.