Seems the compressed DNG is a great idea but lagging in a lot of software.
Both adobe Premiere and Speed Grade ( even last months update ) are unable to open compressed DNG form my BMPCC, however PS and AE have no issues.
Just weird, good standard ( I am a fan of better management of RAW data especially if lossless compressed ) but not widely adopted yet.
If you wish to test a raw compressed DNG I have a frame here you can try import:
http://www.symonty.org/dng/test.dng