Errikos,
every experienced engineer worth his money should be able to create at least a decent-sounding mix with Vienna Suite plug-ins. :-)
But: First of all, we have to define "experienced", of course. ;-) Then the question is: How fast will he/she get there? How inspiring was the way to get there? And why does the MIR -mix still sound that ineffable bit "deeper" and "more true" ...? Maybe because the initial sonic idea didn't get lost during a tiresome mixing-process ...?
For me, it's not either / or. Actually Vienna Suite is meant to enhance the possibilities of VE Pro / MIR Pro. Even Convolution Reverb has its place in this scheme of things, taking into account the sound-designing Timbral Impulse Resonses from Numerical Sound.
Kind regards,
/Dietz - Vienna Symphonic Library