Just wanted to chime in and say a few of the remaining Horde Groups are on Campaign in Desolace right now as well, it started on the 13th? 14th? I can’t remember.
But it is on-going till theee 24th. So you might find very little to none group RP in Org for the time being however that doesn’t mean people will not travel in and out of Org. My group still frequent about if you want some casual RP from them lot as I’m working. 
Edit; The Campaign Thread; [A/H-N] Campaign: Return of the Damned - Dunes of Desolace. 13-24th of September! - #86 by Lochton-argent-dawn