Track changes support
You have got to add track changes to powerpoint and Word. I can't use Sharepoint wihtout these capabilities with my team
We have started adding the capability to see who changed what in PowerPoint Online. When you return to a document where collaborators made changes while you were away, you will see a notification as well as some details about what changed. For additional history, you can try the Version History feature under File>Info>Version History. Let us know if this helps!
Replicate the Review and Editing functions of MS Word into MS Power Point. Presently there is only a comment function in MS Powerpoint. The ability to review and edit Power Point presentations similar to Word docs would be a value added change.