Dear forum members,
as Fredo mentioned, Nuendo 7 will get VCA faders as well as all Cubase 8 features.
We are currently still in the process of developing additional features that will only
be available in Nuendo 7.
There will be some very nice things coming to Nuendo 7, making this update one of
the biggest in Nuendo’s history. We’ll be able to deliver totally new functions and
workflows which cannot be found in other DAW. Plus, Nuendo will get (probably)
all product maintenance of the Cubase 8 lifecycle until the release.
Now, enough “heat up” 
That being said, Q1 2015 for Nuendo 7 seems to be unrealistic so far.
As for Yosemite compatibility, I believe early 2015.
Thanks,
Timo