This should have been working archetype 11 (just as archetype 10). So needs to be reported as MC Stuff suggested. In the meantime, I could get it to work by:
Right click each project > Properties > Project Facets > [select right project facet as listed below]
For [project].it.tests, and [project].core: Check Bundle module
For [project].ui.apps, and [project].ui.content: Check Content module, Dynamic Web Module, Java, JavaScript, and Sightly
The projects would then show up on Add and Remove