I have successfully upgraded ISCS-MDT to 2013 Update 2 (6.3.8330). Please be aware that this is what’s considered a quality release; there are no new major features.

Work completed:
– VMWare snapshot created for ISCS-MDT.
– MDT 2013 Update 2 applied.
– MDT build and production shares upgraded.
– MDT build and production boot images updated.
– Updated boot images applied to Windows Deployment Services.

Release notes and Information:
http://blogs.technet.com/b/msdeployment/archive/2015/12/22/mdt-2013-update-2-now-available.aspx

Things you may need to complete:
– For folks who log in to ISCS-MDT directly you may need to recreate/re-pin shortcuts to the MDT Workbench.

Additional notes:

The Assessment and Deployment Kit (ADK) for Windows 10 was recently updated by Microsoft. This version is cited to have issues which could impact some MDT deployment scenarios. I will be doing more testing before moving forward with this update.