I put a video together on this as well to try and get the word out; I wouldn't necessarily agree with putting the blame completely on the idea that people aren't running it much. Even with the 66% or so rate of filling, you're still getting thousands of players running the UQ multiple times, across four different servers, with 9 potential 14* drops, and not a single one has dropped.
Add to that the fact that if we are indeed on the same patch as JP, we should have boosted EP4 drop rates from the 02/2018 update, and the 0%s across the board comes across as first and foremost a statistical anomaly, improbable despite the possibility.
Players that I spoke with seemed to indicate that the GMs are more than likely aware of the concerns, and some support tickets were even made about the issue, and aren't being closed or responded to, so there may be some more to this than first appears.
In any case, here's hoping we see some address at some point to the concerns, at least. Even a Yea/Nay response to whether it could be an issue would go a long way to assuaging people's concerns.
For those of you interested, the video is here