3.6 Pro - Where did messageExchange request content go??

I have a scripted logger for my tests, which use messageExchange. The script works great in 3.5.1 and the messageExchange.getRequestContent() call actually returns something. Another place where the messageExchange appears to be broken is in the Raw view. If your content has variables in it (example: {"userprofile":{"username": "${from_properties}}, the messageExchange content does not show the actual content that was sent across the wire. Instead, it shows the variable.

Is there a fix for the messageExchange being so severely broken in 3.6 Pro? Are these known issues? If not, how / where do I log defects?