In general I'm very pleased with the direction the product is headed. I believe that the use of Chemistry, Solr, and Activiti are all positive. However, I would encourage you to take the opportunity on a major release to remove legacy components. The size of the main application, not counting share and Solr, grew substantially. CXF and JBPM should definitely be removed. I was a little put of by the continued inclusion of axis 1.4 after you introduced CXF, and now there is a third approach to Web services. It makes it hard for those new to Alfresco to figure out where to start.