This was on Reddit here.
I think talk was going around that not only did it not sound that great but also that it's very hard on Davey's vocals. That's the only thing I can think of. Also, they're not playing a ton off the new album.
I read the same, that it's very hard to sing.
That's surprising because even the set lists they've been playing have (at least I thought) a pretty wide range.
They adjust the tuning on their guitars to make up for Davey's limitation on older songs. Jade and Hunter both mention it in their gear interviews.
Good catch... I missed them saying that.