From what I understand, The Harvey (nee the Majestic) is a bit of everything: faux, real and distressed. When I lived in Brooklyn in the 70s the Majestic was boarded up, derelict and pretty much waiting for the wrecking ball. It wasn't until the 80s that BAM took it over.
Rather than restore it, I think they shored up some of the falling plaster and chipped out a lot of what was already coming down. The 1st balcony was removed and the orchestra floor raised and then steeply raked under the gallery. The stage was also opened up and thrust forward beyond the proscenium.
But they also had to update the plumbing, heating and air-conditioning so I don't know whether the ceiling is a reconstruction or a save or a bit of both.
All of this was done to please Peter Brook who was going to have a resident company there. His 9 hour production of The Mahabarata opened the theatre, and also a 3 hour production without intermission of The Cherry Orchard was done under his direction.
The legendarily uncomfortable seating is his thought because an audience mustn't be too comfortable.
I like The Harvey, painful seating and all.
BAM addendum - If you go to the BAM Cinemas, these were carved out of the Playhouse which was a 1200 seat one balcony theatre. The proscenium of the Playhouse is intact in the large cinema that is entered upstairs (I forget what number it is). In the mid 70s this space was named after Helen Carey, the late wife of then Governor Carey who died in 1974 of cancer. The former Governor died last week.
"If my life weren't funny, it would just be true. And that would be unacceptable."
--Carrie Fisher