Man there's a lot of whiners around here. Armor heirlooms needed a nerf. With the current heirloom philosophy in this mod, you are only supposed to get slight bonuses for them. They aren't meant to be game changers. The game is about skill anyway, not crutching on equipment.
Also for the record, I use a Heraldric Mail with tabard. I don't give a shit that lesser armors are better. If they fix it tomorrow or don't, I don't give a shit. I use it because I like how it looks, not because it has a couple points better or worse than something else.