Just divide each facet into 4 parts + and then you would have a NE, NW, SE and a SW quad so you get all the maps for a Facet say in the NE and go do those that way you are not running all over the place doing maps.
-- Usually, I am either on the same page as you are on things or at least understand where you're coming from ... however, on this I'm not.
If that is a sort option in a Davies Locker menu, then what is the point of having a "Treasure Hunter"?
When a friend and I decide it's time to do more TMaps, I'll pull 20-30 maps from my locker and decode them all at once. Then I group them together myself based on where they're located.
I have found that in a group of 20 maps decoded in a 5 minute time period, they are usually all in the same general spots anyway. In 20 maps, I'll have three separate map areas to go to, but there are five or six maps in each basic area.
Any maps not in those basic areas, I'll put back in my locker for another day.
My personal opinion is that any sorting added to the Davies Locker beyond Map Level, Map Facet, and (once the publish goes live) Map Profession will take away a lot of the point of a "Treasure Hunter". It might take a few extra minutes to decode maps and lump together manually - but that's part of the fun. Automating everything takes away a lot of the point.