I figure MIRacle is good if you want to blend VSL instruments with instruments in other halls?
Actually, MIRacle is meant to add some artificial (and typically modulated) reverb tail, on top of the otherwise unaltered room information derived from MIR Pro. After decades of audio engineering our ears got used to that kind of nice, but completely unnatural aural sensation ... the combination of MIR Pro and MIRacle could be seen as some kind of glorified hybrid reverb. ๐
Kind regards,
/Dietz - Vienna Symphonic Library