We mentioned already that item upgrades would become purchasable with Lesser Charms of Good Fortune. Now, Blizzard has clarified a host of changes to how currency will work in Patch 6.0 and beyond. In addition to being used to upgrade items, Lesser Charms will now be directly tradeable for Warforged Seals, and there's no longer a restriction on how many you can get in a week - You can dump literally all of your Lesser Charms to Seals if you so desire.
Other changes include the utter removal of Valor and Justice points (not Honor/Conquest, those remain), the removal of the Test of Valor component of the legendary cloak quest (you can still get the cloak, you just don't need to get the Valor points first), and the switching of all honor/justice items over to costing gold to purchase, including heirloom items.
You can read the post here.