Same here all my cables are buried in the chimney also you lose a lot of functions for example I can be watching something using my Chromecast or fire stick but then have audio from whatever channel the 360 box is on. (I have a optical cable from 360 to sound bar) I could route the cable from tv to sound bar but that requires a big effort to get in the chimney.
Its just not on, everything was fine in the good old days of V6 but this upgrade has ruined my virgin experience.
Sadly I'm sure a fix is simple if only Virgin treated the problem with some respect and urgency. It feels a bit like the story of David and Goliath !