If it's all fly by wire, I'd think you would want the FDRs as physically close the actual data source as possible, not hanging out there at the end of 100 or more feet of cable. Seems like an architectural anachronism.
Which data is most important in accidents? Command data (from flight deck or autopilot?). Actual control surface data from control surfaces? Engine data? Engine command data? Sensor data (The typical aircraft has sensors basically on every part of the fuselage/wings/tail).
Do you design a recording system that is finer tuned to mechanical failure, control data failure, human failure? Specifically, what do you deem anachronistic?
You can please some of the crash investigators all of the time, and all of the crash investigators some of the time, but...
