I watched the stream last night in real time and it was a great show!
Being a high quality stream, and I was also wearing earphones, I could clearly hear and distinguish James' live vocals vs the backing tracks. He sounded really good, though he struggled in some sections, specially during PMU. However, I was shocked at how much of the "lead" melodies were piped in along with his live singing throughout the show and not just "extra" vocals added. And THAT infamous section on BITS clearly shows that the lead melody is being carried entirely by the tracks, while he sang in a lower, softer voice.
While he's clearly singing and not lip-syncing, they seem to be relying heavily on the tracks to mask some imperfections/weaknesses in the vocal department, more than ever. JP's mic was inaudible too