I don't think anyone has commented on what it's like inside, so here's my report if anyone is intersted.
It's a really nice venue in many ways. They actually tried to make it look like the Fillmore in SF to some degree (red curtains, same chandeliers). It's got a similar setup to the 9:30 with a balcony that wraps around. The middle of the balcony has a couple tiers of tables and chairs, which remided me of the VIP section at The National, then there is a bar at the back behind that. On the sides of the balcony, there are a couple of tiers, then a second railing, then three more tiers. The tiers are steeper than at the 9:30, meaning that the sightlines are probably a bit better from the upper tiers.
The sound was very good, and the staff were friendly and well organized. It also seemed pretty comfortable for a sold out show and not too packed at all. On that one aspect, I think it was better than the 9:30, which just feels slammed when it is sold out. The venue didn't really feel much bigger to me than the 9:30. Maybe it fits more people upstairs, but the floor itself didn't seem much bigger.
Also, the Phantasy Tour folks will probably be pleased to know that they don't seem to care if people smoke weed, so they should be good to go for the Trey show.