I am not payed by or member of any pool... I'm just an average miner.
I speak from my experience and from what I hear from my friends with your pool.
I'm not a dev, and I don't pretend understanding how everything works. If you make a pool by your design that's admirable; cryptocoins comunity needs more good devs to develope and mentain this modern revolution.
On point... I don't know if hashrate is reported correctly, but a few days ago it was greater than entire network, and changes a lot - yep, maybe there are many reasons; this is not so important.
The var diff is what bothers me... I have a rig with constant 2830 H/s; it mines for days and the hashrate is the same. My internet is superstable (optic fiber). On sumo.hashvault the var diff algo sets the vardiff around 84000 after a few hours, so that's a good diff for 30s target share time. And remains constant day after day.
Now, at fairpool I mined in day 1 after sumo fork, for several days, my paiments where true, the profit was what is suppouse to be, so no problems here. But the var diff algo started at 5000 if I remember correctly and after 24h, it was increased to only 35000 or so. The number of accepted shares was huge. Explain to me why is this better? Why is better to choke your server with huge ammounts of low diff shares?
And yes, accepting shares on the old PoW is not normal. For ex, hashvault rejects those shares. I don't mine with the old pow, I just tested to see if it worked.
Now that sounds a way better.
Honestly vardiff algo being tested thousands of times before. And is one of the things i'm proud of.
But i'm always open for any feedback, improvements suggestions and feature requests. If there is a flaw, we will find it, so it will be even better.
Being a bit busy right now, am setting up additional Haven and SUMO stratums.
I will contact you through PM a bit later and together we will perform live testing to check the vardiff and find the consensus. Of course if you will be interested in doing some testing while i will monitor the system and the network traffic.