I dunno, I think there is a bit of a trail of breadcrumbs to follow, it's just not as blatantly obvious as a big glowing exclamation mark over where you need to go.
You meet the trust guys they tell you that they're from the jeuno institute, so you go to jeuno and you meet Jamal, he gives you a bundle of trust scrolls, you get some trust and go back to him and get a new trust quest for AAGK, seems legit to me. Only cryptic part is that you wouldn't know you need all 3 nations trust to talk to Jamal for the first quest and zilart complete to get the second.
If you look at it like "they said in the patch notes I can get X now but not how" then yes it's cryptic. But if you look at trust as a whole then it's quite plausible to follow along.