Well I'm not saying I'd be against the idea since Sort is a function that you only use once and are done with, until next time.
But all the confirmation for moving stuff in and out of fc chest, ugh that just kills me.. sometimes I just log into my friend's account on my laptop and just mail the stuff back and forth to my alt because it's actually faster than dragging the item to the fc chest slot and confirming.. then waiting for the stupid server lag to finish(if you do it too fast, you get an error) then put the next one in... UGH