Cloudera is routinely ahead of the rest of the market, and has been a great partner. However, if all feedback is positive, you never learn what you can do better.
Spark 2.0.0 was released July 26, 2016. That is 541 days ago as I write this post. Spark 2 is still a bolt-on after-thought.
It doesn't work with HBase, Oozie and a host of other components see "Known Issues" .
I know there are incompatabilities between versions, but that is, or used to be, Cloudera's core competency and value proposition.