Yes.

: If so I will hold off getting an XBone until you OK the port.

: MCC without ODST port = meh

: MCC with washed out, bad audio ODST = already got a good version of ODST

: MCC with fully working ODST port = all Grizzlie's gifs plus Grunts Birtday
: Party!

So, here's the deal with the audio:
-Some of the filtering has been changed (i.e. on radio voices)
-Reverb seems to be flat-out missing
-The way sounds are mixed is poor, especially with regards to distance and direction

The first two bother me, but a lot of people don't really seem to notice. The third one isn't that huge of a deal on stereo speakers, but people using headphones and/or surround have been been pretty annoyed by it.