story wise is difficult to tell, but i'd go for a realistic point of view.
from a realistic point of view the order is against 2 teams far stronger than they are, with no advantage of any kind, and that is much worse than being unable to talk to the draketooths because you can't find them or they refuse to listen.
story wise, the order will manage to win somehow, so all will turn out well.
but, story wise, they would also have been able to talk to the draketooths somehow.
So it never was the right mistake if we keep a unified perspective on the story.

However, if we consider the current plotline storywise, and the alternative story where familicide never happened in a realistic pow, then it becomes a conveniente mistake.