Lufthansa to Change A350 to A340 on MUC-IAD Daily Service

Lufthansa has announced that they will be changing the daily IAD-MUC-IAD service from an A350-900 to their Airbus A340-600. 

SeatGuru - Lufthansa Airbus A340-600 seat map

This is the Lufthansa seat map for their Airbus A340-600. Lufthansa operates their International A340-600s with a 4-class configuration: first class with a 1-2-1 seating, business class with a 2-2-2 seating, premium economy with a 2-3-2 seating, and economy a 2-4-2 seating.

SeatGuru - Lufthansa a350-900 seat map

On their airbus a350, however, Lufthansa decided to just use a three class aircraft. This is similar to other airlines' attempts to decrease the cabins on the aircraft, such as United's discontinuation of their Polaris First seating on their Boeing 777-200s. 

Lufthansa's decision also means more revenue. As the A340 holds more passengers, the airline will be getting more money for every full flight. Also, the airline will be getting more revenue per flight due to the increased amount of First Class seating, which costs more.

The A340 is becoming obsolete, so Lufthansa is going to have to substitute the aircraft for this route once again. What do you think their plan is for their MUC-IAD route in the future?