Welp... FINALLY managed to unlock The Brightest of Their Age. And I think I may have figured out a workaround, at least for Xbox One players, who have problems with achievement tracking in DAI. Here's what I did when all other troubleshooting methods failed to solve my issue: Delete all of my data/characters.
You're probably gaping at me like, "there's no effing way I am doing that". Just hear me out; it's not as extreme as it sounds on the X1. Even without a Gold membership, your saves are constantly backed up on the cloud. Though it requires "temporarily" getting rid of your previous characters, it may reset the tracking for a new one--at least it did for me.
Here is what you do: Delete your DAI saves from the console (for an explanation how to do this in detail, here). Start a new character and DO NOT resync your cloud data with the console; your achievement tracking should reset. For me, I recruited every team member and the percentage updated until The Brightest of Their Age unlocked. I then reset the game and resynced my cloud data, which returned my previous characters' data. My achievement counts for my main Inquisitor returned to normal, too.
I encourage everyone who has an X1 to try this to see if it works. And for other systems, if you have tried this and it works or have different workarounds to help out other players, please post them!
No idea how you got this to work for you.
Followed your instructions exactly and my progress on two achieves (Brightest of Their Age and Persuasive) are still stuck at 83% and 70% respectively.
