Time for a change? IMHO, MDR on the ground using the latest met info ie 214 and observation, to build an approximate picture of the flight.
Into the air and get the actual wind vector at en route altitude using the new kit on the market designed for use in the air.
MDR from there on with updates of the wind vector according to time available and need. Groundspeed and WCA and the kit(no changing of glasses) gives the wind vector in 5-10 secs.
Time moves on, things change, sometimes for the better.
Improvement in the nav kit we use is possible.