If you are not following discussions on (illumos) developer lists or IRC there is not much beyond marketing noise yet coming out of Nexenta. (YMMV)
The core OS developers at Nexenta you see getting fixes upstream are doing a great job, I don't think they are the ones to blame.
The current positive light I saw on the horizon lately was Nexenta finally pushing their source code branch of illumos (underlying OS) out to github.
For comments consider Dec./Jan. issue of illumos watch written by former OpenIndiana project lead Alasdair Lumsden and still quite active chap in the
illumos community: illumos watch Ã¢â‚¬â€œ December 2013 & January 2014 - EveryCity | Managed Hosting Services
I saw NexentaCore, illumian and their initial mercurial OpenSolaris patch source going away and how NexentaStor CE got less and less love while EE didn't much advance since 3.1
beyond some stability and security care either. For personal / lab stuff I've moved over to FreeNAS or FreeBSD or OmniOS when there is a need for something Solarish.
For current production use, well I don't know currently what to think of the situation, I'd better not in fact as long as it "just works" for what it is in use.