I think there are many system applications where a unity gain buffered output would be preferred. Of course, the buffer stage needs to be really, really great to keep the (claimed/apparent) advantages of the LDR VC… So, I would only recommend building buffered versions if you are capable of designing a great sounding, low noise, low distortion discrete buffer-preferably with no global feedback…
I think, then making a separate buffer module available as well for the DIY folks would be appreciated as well, as would a true balanced version.