I just helped a guild claim Gilded Hollow. We pulled in three PuGs, we successfully fought the maws and axemaster first try, only to have the patch hit that fixed the map uncompletion bug.
I left the hall before they claimed it (I didn’t want the map bug, and when I got the patch I tried to rejoin the instance but could not get in with them), but listened to them claim it on Skype. Only it didn’t work, “guild hall functionality is disabled” and now the whole mission reset.
It wasn’t easy for them to get the 7 people together for this