Well, I was also quite overwhelmed that after having spend 10.000€ + (I actually don't wanna know how much it really was) on VSL samples now it starts all over again with a new dimension series. But it seems, this will be brass specific. Since Herb avoided to answere this regarding strings, there might be something under the hood... who knows ...
I really don't mind VSL pushing it further with recording more libraries. After all, VSL samples have their weak points, too. So why not overcome them?
But: The new dimension Brass doesn't really convince me enogh to invest in it for 500€. It's so basic in terms of articulations that there will be a volume two. Maybe even more ... So I think of more like 1000€+ investment to have it complete. That is to much, considering what I already have spent on brass. But that is by no means a complaint - just my decision. The sound didn't really beat good renditions mixing Brass I+II with other brass samples. I can see (and hear) some advantages with this library, but for me they don't justify the price ....
On the other hand, there is one thing, VSL should be considering and that is their hardcore customers (of course I am biased here...). In the past there were more special deals for customers that have a lot of VSL stuff, already. Maybe a special deal would have convinced me to buy, so I am not sure if that is really so smart for the company. In the past I bought some VSL libraries that Ibarely used up to this day, exept for maybe one instrument. And I am not sure, how often I will have the needs for some of the more exotic instruments or articulations in the future. Still I bought them, cause it was just a good deal ... VSL must know, how good dimension brass is selling right now, so I am sure they will react in their own interest.
And one more thing: It's also important, that customers kind of like the company on a long term ... for my part I haven't bought anything from East West any more for a long time. Even though some libs sounded pretty amazing in some terms. I just don't like them any more ... ;-)