Back in July, Office 365 and Lync Online released some initial reports. I posted some information about it here - http://www.astaticstate.com/2013/07/new-lync-online-reports.html.
I was just announced that this reporting capability has been expanded - http://blogs.office.com/b/office365tech/archive/2013/10/03/visualize-lync-usage-for-your-business-with-new-reports.aspx. These are new visual reports that used to only be available through PoweShell or REST Services. Now you have visual reports on active users, audio/video minutes, conference minutes, P2P sessions, P2P conferences, etc.
This provides good report information that can be presented to your management to show how the Lync Online service is being used.
This is really valuable information as it allows customers to get a handle on Lync utilization. This can be helpful information for tweaking your network configuration to support Lync Online services. For more information on more on network planning for Lync Online, recommend you read the following - http://technet.microsoft.com/en-us/library/hh852542.aspx and utilize this tool http://www.microsoft.com/en-us/download/details.aspx?id=19011.