It seems to be a common misunderstanding that Vienna MIR will be some kind of glorified Vienna Suite.
The Vienna Suite plugins will work with or without MIR. Likewise, MIR is not dependent on the VS-plugins (although it can host them, of course). Both product-lines are meant to complement each other. VS won't become obsolete when MIR is released. MIR is not "the reverb plugin" of the Vienna Suite - it's a stand-alone mixing and reverberation engine (and host) for our Vienna Instruments.
HTH,
/Dietz - Vienna Symphonic Library