The customer response to Achievement Feats is the reason we never did anything with them again. People were NOT, overall, fans of these feats. Some folks thought they were way too "video gamey" and thus had no real purpose in a pen-and-paper game, or even that they cheapened the pen-and-paper game. Others didn't like how much paperwork that they made the players track. Still others thought that they were too easy to abuse by spiteful GMs. There was a fair amount of this commentary, and not a lot of "woah, that's cool!" like we got for traits or haunts or several other things we tried out in the Adventure Path.
SINCE then, I've heard from some folks out there who did like them... but at the time, none of those folks really spoke up.
As a result, there's no plans to have Achievement Feats show up in Pathifnder.
We ARE going to be presenting a new history/story-based feat in Ultimate Campaign though.
Thanks for the detailed answer! It's too bad that they weren't very popular, but I suppose I'll always be able to make my own Achievement feats if I ever want to throw them back into my campaigns.
Those history/story-based feats sound like exactly the sort of thing my group would love. My anticipation for Ultimate Campaign: +1.