The problem with the Berlin instruments—I only have the main strings, so caveats there—is that the instruments are already unwieldy RAM hogs even with only one mic loaded. They become even more so with multi mics. I agree with you about the depth and color of sound you can get though.With libraries such as the berlin series - you can worth with even more.
2 different close mics, ortf - ambient - tree - surround... you can push it back bring it forward/back/widen/center/tighter/looser/even kind of shinier/more dull.
Spitfire series was never my favorite - but even in the berlin series - where everything is recorded at standard levels, in the same setups - in the same room, I drastically mix the microphones differently between sections. It's also painfully obvious how "flat" the demos on OT's website are that only use the tree mic.
I figured It's only fair that I use mics from libraries I don't even like to still sculpt a sound I am okay with, rather than being the raging teldex fanboy that I am