I'm one daily heroic from swapping two heroic pieces of gear out for two pieces of the "tier-11" gear. I was trying to decide if I wanted the gauntlets and chest pieces or the gauntlets and leg pieces. I'm glad didn't buy anything yet because it looks like the crafted gear is getting buffed. These were originally slated to have the slots added, but they canceled it. Now it looks to be back in. But with good socket bonuses.
I currently have both of these crafted mail items.
Chest: Current - PTR
Belt: Current - PTR
As you can see, thanks to the red socket bonus and desirable +40 agility gem, these would net +30 agility each. This is definitely worth considering if you have either and are thinking of retiring them. So hold on to them until 4.1 rolls around!