Doesn't the catalog show the previous position of the headlight? There is nothing "incorrect" about modeling the engine at a different time period. I believe someone from MTH stated in the catalog thread they would be making both headlight placements in time. Mike Wolf also stated they would find an appropriate tender to use a the auxiliary tender while being interviewed by trainworld.
Also, why is the MTH 425 model nickpicked but the passenger coaches ordered without criticism? MTH is using their standard passenger cars with 6-axel trucks and partly round roofs. The R&N cars they use on their excisions all have 4 wheel trucks except for their first class/executive cars.
