We understand that everyone is busy, particularly over the end of year break. And with the rapid pace of BIM 360 development, you may not have had time to review all the new features packed in from the past couple of months.
So we've saved you the trouble and collected them into this enormous summary. And these are only the highlights! Check out the source links for a few more, and of course for more details.
Document Management
December Release
Source: http://blogs.autodesk.com/bim360-release-notes/2018/12/13/bim-360-docs-update-december-13-2018/
Review and Approval Workflow Improvements and Enhancements

January Release
Source: http://blogs.autodesk.com/bim360-release-notes/2019/01/16/bim-360-docs-update-january-10-2019/
Review Comments

Reviews List

View Levels

Design Collaboration
December Release
Add Packages to Document sets
Additional permission level ‘Control’ for team administration
Manage Master Model to use for levels and phases
Hypermodel Navigation: 3D views icons
Change Visualization