Thanks @David Lai for the response to me from above (in terms of being relatively impartial about your reviews).
I do agree meanwhile that the Modern D seems more meticulous done compared to the Ivory, in terms of its technology, and capturing the essence of the instrument, and just overall "getting it right."
It's probably the first sample-based VST that I felt rivals the responsiveness of Pianoteq. Modern D "feels real" while "sounds real" at the same time. Whereas, VSL to me has some amazing sounding instruments, but the user-to-instrument connection is less there (as well as some other coding quirks).
So far, my only quip is that the middle C# seems to be louder than all other keys (I didn't have this issue with my other VST's, so this seems to be isolated to Modern D, and not to my VPC1). I did use the VPC Editor and reduced middle C# by about 10 velocities. Would love that to be updated!