This has been debated many times, and basically many people (me included) feel that this is a necessary instrument. Many voiced their opinion that they needed a 2nd voilin section for various reasons, but VSL does not think it is necessary.
Here's what I do:
- Edit the violins 1 by transposing it up a 1/2 step. This is now your 2nd violin section.
- Pan and reverb like you would a completely different section because IT IS!
Your question about loudness and richness is a bit confusing. The combined sound of two identical samples will be considerably quieter AND less rich because of the acoustic principle of phasing.
When you play 1st and 2nd violin unisons (which happens quite often), you get phasing problems all over that place because it is exactly the same wave form playing on top of itself. When you transpose it by 1/2 step, it sounds very similar, but there are no phasing problems. The reason why you need to transpose it UP a 1/2 step (in my opinion) is because you want a slightly darker sound in the 2nd violin section. You will get that slightly darker sound because it is recorded samples 1/2 step lower, therefore less string tension, bow noise, etc. The very slight difference makes all the difference in the world. This procedure applies to all instruments as well - 1st - 4th trumpet, 1st-3rd clarinet, etc. Just transpose each respective instrument up another half step in the giga editor, works great!
I hope my long-winded answer helped.
-mvanbebber