Guild Wars 2

I think to answer this question we are lacking alot of vital information on the pact at this time:

1.) We don’t know when it happend compared to the personal story

Is it shortly after fighting Zhaitan, long after Zhaitan, while we fight Zhaitan? This is fundamental to understand wether or not the pact has the troops/weapons to fight off scarlet. But we lack the information. (Anet is probably discussing alot atm how they fit the living story in with the personal story, because thats the major problem here)

2.) We don’t know anything that happend behind the curtains (even though we should have known since we are the second in command of that force)

We don’t know what Traherne thinks, what his concerns are or what his plans are. He just told us that he leads the pact to “the next challenge”.
Maybe he is worried moving the biggest army in tyria into a free city can be misinterpreted as an aggresive/worrisome move.
Maybe he was threatend by scarlet.
Maybe he doesn’t care because it’s not what’s the pact supposed to do.
The problem is we can’t speak to Traherne to find out. He seems to be invisible since the personal story.
(The major problem here may be the same as in 1. or that Traherne isn’t well liked in the community)

I think we get most of our answers in the next few living story patches, because then they need to put the living story and the personal story together and we maybe get to speak to Traherne to find our answers.