You didn't miss anything. :-)
I understand your thoughts, but for your "wide" setups it will be the best to use individual setups. Soundwise, Dimension Brass is primarily meant to be used as an homogeneous ensemble, much like the "conventional" ensemble recordings already available.
Of course, we will try to integrate Dimension Brass with MIR as good as possible, without sacrificing too much of the possibilites of both products. For now, please refer to the setup I outlined in my previous message.
Kind regards,
/Dietz - Vienna Symphonic Library