actually, since people try and steal every scrap of info about me as a consumer, I will give you 100% of what I have in mind without SO having to do market research for it
.
I'd like a mini exposure, integrated 21 inches frame (I do get I would not have load lifter use at that size), standard SO belt and harness, NO mesh pocket NOR external back pocket -- I much prefer a talon because it is more flexible, most likely offers greater compression and I can stick stuff between main bag and talon (side cordura bottle pockets are good though). For this application I'd love a (XPAC!) talon that is as wide/tall as the main bag. I live in places where it rains as much or more than it does not, so I need some water resistance (did I say XPAC?) all over, and the side zipper of a talon and the lip over the main zipper of the exposure are great compromises for that.
To give even more info, the two reasons why I am not going for a HPG Aston House BC are (1) exposed zippers and (2) weight, especially with belt and compression pocket -- it would fit my EDC needs otherwise.
Make of the above whatever you want, it is admittedly ONE single data point.