We all know the pain of having to clean out our mails after a session of PvP. I propose we get rid of these annoyances with a simple replacement plan:
A quest that adds up your AP gained and gives you an equivalent gold amount as a reward. When turned in, all accumulated AP converts over to Gold.
The mails come every 3k AP or so and have about 120-190 gold (item + gold) currently, thus every 20ap = 1 gold. To take care of the equipment issue (Faction set items, not the crap stuff) they can be added to the store at a more affordable prices (say 250g/each still more expensive than if we were to farm them currently) and at proper levels, same with Filled Soul Gems. Or just add Soul Gems to the quest every say 12-15k AP (which seems to be about average) so if you turned in @ 45k AP, you get 3 soulgems too.
Bam! Simple solution to an annoyance that plagues all long-term PvPers.