Good grief, Lyman.
Nobody that could do anything was in the rear of the jet.
The tail surfaces were probably in "clean air" due to the attitude of the jet, and had the pitch authority to get nose down attitude if only the pilot(s) tried. So I can't see any burble or buffet from the tail. AF and BEA admit that there's a "neutral" zone on the pitch coefficient curve that results in a constant pitch attitude with no inputs by the pilot. The jet still has a positive static stability, so pushing forward to overcome the control law that keeps trying to achieve one gee would eventually result in a downward vector. Let's face it. The crew did not realize that they were in a stall and may have been relying on the urban legend that "you can't stall this jet".
I can just see Appendix "Z", section "x" of the report. Before being crushed by impact forces, passenger 'X' cried out on his iPhone that unusual forces/vibrations were present due to tail surfaces in a fully stalled jet. BEAM ME UP!