Edit, having just seen a picture which shows that the 66 wasn't even removed and they hooked the grid onto it I definitly would have felt hard done by if I were a grid fan.
So if you were a grid fan, and suddenly found the loco had an extra 100tonnes+ to haul, you'd be annoyed. Why? The shed wasn't providing traction, so why does it make a difference?
Quite a substantial thrash barrier however.