I surely wouldn't mind more framework for RP elements in the AP. Things like more alternative ways to do things, aside from combat. I'm speaking of things like going through a trapped area, to sneak around a patrol - or what have you. I don't know how else to describe it, there are mechanics I set up in my home campaigns that rely on puzzle solving, with information to be had from various formats, including speaking with NPCs and such.
But anyway, just personally some things that would help me a bit, as a GM, in the AP would be possible a short hand description of the character of the variety of NPCs the party meets. In trying to keep the game within the framework of the background to Pathfinder's world I sometimes wonder if I am making the right decisions. A few more details on incorporated stories would help (the rumors for instance)
But I realize the onus is on the GM and obviously there's only so much room in the AP, and there are guides/helps like the campaign setting information.
Our group is fairly new to pathfinder and I'm still trying to learn the background and incorporate the 'world' that Pathfinder uses, I think a lot of my questions would be moot if I knew it better. And possibly, I'd be able to guide our group into more RP encounters and fewer combat encounters.
Perhaps it's simplistic, but since my group is made up of younger players (the oldest is 17), I tend to gloss over such things as wandering monsters - unless they've spent just an inordinately long time in one area or made their presence impossible to ignore. The combat encounters are just too long as it is, played out in our group particularly. (I don't mean that's a game fault, it's the maturity of the group.)
I wish I had some more concrete ideas for RP elements that would help in an AP setting. I guess it bears some more thought. I like the APs very much, thus far (we've played through one and a half). It's always good to improve things while recognizing their limits. I love the society/community of the Pathfinder forums because they are so obviously passionate about improving the game.