Sorry to bump a months-old thread, but better than starting a new one (hate repeated topics when you could just search to see if something's been discussed before). Anyway..
The mic placing feature of Pianoteq is a really useful way of changing the tonal colour of the sound, although it shouldn't be really should it?
Strangely then, it is possible I have found to make the C3 sound like the K1 just by dragging the microphones a millimeter or 2 vertically up the screen when in close to the piano...! Its fun but also a bit disturbing. I don't mean to criticise the user interface or the clever guys at Modartt who are Gods let's face it, but rather than asking users for their post-processing wish lists, perhaps this feature should be re-visited first??
A zoom-in feature is the way to go I think, so that a millimeter dragging of a microphone on screen corresponds to a millimeter drag in the "room" would help lessen and control the surprisingly extreme changes in the resulting sound.