Does any airline have its F class in the middle of the plane to benefit from this smoother flying experience?
Not that I am aware of.
I guess they couldn't have the first class pax having to go through cattle class to embark and disembark, also for the bathrooms, cannot really have them over the wings.
I do not really like being right down the back, usually noisier, but it is the safest place on the aircraft, where on all the aircraft I am familiar with they instal the black boxes.