2. Rear pressure bulkhead still seem to sit at its installed position.
how do you reach that conclusion,, which images?
First of all, there is no visible damage around RPB. No peeling. I think you have seen plenty of images of tail section.
Then one HS was found broken off just outside of the fuselage. RPB explosion could not do that.
Also, if you try to peek into tail section there you can not see any gaping holes. Instead it looks like RPB sitting there.