In my opinion I can say that Vienna has the best instrument quality all over the world. I tested more than 10 companies including East West Project Sam and many more... It is a premium quality at all... Honestly I do not like the Appassionata strings because they sound a bit like phased out in some Velocity steps, but the Chambers and Orchestral Strings are amazing in playing and in sound.
The competitors EASTWEST or anything like sound always like a real sample factory, I tested their new Hollywood Strings and it still sounds like a normal sample box, not more and I have to pay for more than 1000 Euros... I thought they are joking. Play the samples completely dry and you know what I mean... Anyway.
Again, this is business, if you know that you have a very good product, then you create your own philosophy to reach people to buy their biggest boxes or DVD Libraries, so you share appetizers like SE and SE+, you guess that the people want more of this stuff and share new appetizers and release the Download instruments and discount options.
You can change to competitors or you pay the premium level that VSL is offering. This is your choice.
It is just my opinion, should not be yours...