I'm looking to install OnCommand Unified Manager 5.2R1 in our environment, as it is the only version available for download now. I've had a quick look at the release notes for the 5.2R1 for 7-mode. We have some old 2040a's running DoT 8.0.3 and haven't seen that there are any new features with this release, only bug fixes and and a security related patching. eg. "Important: This release addresses a vulnerability in the OpenSSL library when using heartbeat extensions during TLS session establishment."