So...
I actually do miss that "sound" of the classic cast albums - a.k.a. pre-digital, pre-ProTools. I know there is something to be said - and admired - about a very "clean" recording, but sometimes things sound a bit too clean to me lately. That's what immediately turned me off about the OCR of the revival of A Chorus Line - along with the fact that they used a digital piano. I LOVE the the "dirt" and "muddle" of the original OCR.
On the other hand, I really do love the sound of the In the Heights OCR. The modern/pop/rap/Latin score and arrangements really do pop on the recording, and it was also nice to hear some very slight "issues" in some of the choral sections. "Clean" does not always mean "exciting".