Galaxia is very powerful, but it's power has not yet been explored as it should. Making it a module might reflect the poor integration with rest of Tiki we have now.
Instead, why don't we create a mod type "workflow"? This would incite people to share the XMLs of the workflow they do. We could have workflows to manage lots of things in Tiki like create users, moderate tiki objects (forums, image galleries, wiki pages, etc) creation, approve many actions common users can't do (send newsletter), etc. Tiki would have several administration profiles based on which workflows you use. If we use it more and share, Galaxia can gradually blend into Tiki.