I don't think that WiFi, BT or GPS/Glonass would negatively impact the stability of a D5 camera body. Material science has progressed to far for that to be true anymore. The so-called monocoque bodies like the D5500, use a carbon fibre reinforced material, which is very strong.
I think Akira's argument about suitability in environments where radio interference is much more relevant. (I assume that an Aegis ship has some very sensitive equipment that could give interference problems.) The problem with some of the WT units have been their lack of ergonomical integration with the camera body. If Nikon can improve on that, I think everyone could be happy.