Hello Matthias,
What's the reason for the extreme secretiveness?
There's no 'extreme' secretiveness as such.
Brett just wanted to keep the existence of a new sample set in v4 as a nice surprise.
We've previewed a lot of the v4 features publicly but not all of them yet. (We have competitors and, like anyone developing innovative products, we have to be a bit wary of people copying from them.)
Also, features are subject to change during development and having detailed discussions about forthcoming features on the forum or via email inevitably takes some time away from development and delay the release to some extent, so we have to strike a balance.
Best regards, Martin.
Hauptwerk software designer/developer, Milan Digital Audio.