If you watch the 2.1 video, at 5:21, when they're doing the preview for Pharos Sirius, the group they're using consists of a WHM, a BLM, a gun using class (MSK/COR likely), and a spear using class that seems to be wearing heavy armor tanking (looks kind of like Darklight but definitely not the DRG armor) and tanking (he never attacks from side/behind and is actually tanking the boss at 5:30).
Think this is confirmation that there's a LNC tank job in the works for 2.2?