I had trouble getting Void Ark and Mhach, but they eventually popped (even got Void Ark a second time after only waiting 3 hours!)
I have yet to get into Dun Scaith after numerous extremely long waits.
I just had a group finally hit 22/24 spots (needed 2 DPS) only to then have 3 DPS leave, 2 healers leave, and then the whole thing drop down to a 12/24 with no tanks.
And since you can't really PF into these, it just ends up being a waste of time.

It is getting obnoxious and it is extremely annoying for the only solution to be "Wait for months and see if they actually get the roulette done".
You'd think there'd still be enough people running through this for the first time to actually get a group going, but apparently not...