With regards to my post above: I had to manually add *all* workers to *all* algorithms pages in {ALGO} > Workers > Worker name/password. Having them defined in the "Hub Workers" page was not sufficient ... none of them were showing up on any of the algorithm stats pages.
To the pool OP: you really should fix the European server issue. At least 5 servers that respond to europe.equihash-hub.miningpoolhub.com are in fact in Japan with a ping of 300ms from Europe.
I already reported it here but no response or fix.
It is happening with the Ethash servers aswell, they have some kind of DNS round robin and a few IP's that are returned are being routed through Japan. Alternatively you can use us-east that has a latency of around 100ms (depending on where you are in Europe).
However, I just went back to Ethermine for now...