Dynamic Link from PProCC to EncoreCS6 does not work
You can work with the export settings. You can get good quality out of direct exports.
I have not done it, but requests for an option in PR CC to do a "save as CS6" resulted in the recommendation to use the export as XML (or some such). I think this is used to get projects into FCP.
So try that as a way to get your PR CC project into PR CS6.
Or like some of us, just stick with CS6 and use dynamic link.
Unfortunately, CS6 no longer seems to be an option for downloading from the Adobe Creative Suite.
So I am reluctant, now, to recommend Premiere Pro to some of my clients who want to be able to create DVDs and Blu-Ray discs.
At least until Encore is available as a separate download, which I had initially thought was going to be the case. Apparently I was wrong.