Currently you can’t get the “tunic” appearance for the new shaman tier set for the PvP colors (green and purple) I’ve gotten both 1800 rating and bought the conquest gear and still it is locked, you can check the appearance on the appearances tag but you can’t obtain it at all.
Please fix
It’s ugly anyways why would you ever use it? 
The pants option looks worse imo. Like some cloth pants.
I find it weird it’s the only set that’s different from it’s pve set, no other set does this so i’m assuming it’s an error on their side.
Agreed with OP!
it’s literally in the appearances tab, too!