I think another problem is that a musical episode came way too late in the show’s run. Had it happened when the show was still considered pretty successful, perhaps it would have fared better. But let’s face it, a significant chunk of the general public has clearly moved on from this show, and they weren’t going to be swayed back that easily.
Agreed. They probably could have got away with it in season one, but it just feels too much like a ratings stunt now. And with several other shows having musical episodes recently it also doesn’t feel that fresh.