Re FMS + TU native system. At Smo blog someone noted that Western things are all electronic and buttons, while old Sov. are famous for being sturdy heavy metal. So how smoothly will FMS move around heavy levers, that is, command them to be shifted around?
At least, the FMS is able to generate "ILS like" signal and thus it could be interconected with the a/p of Tu154. If it was done, I do not know. But in this case (as I mentioned before) there was reportedly switched pitch stabilisation mode on vertical canal of a/p.