Impressive information, thanks!
As for fees, someone did the math, and due to the 1000 SEM burn, your asking fee of 1-2% would *never* regain the initial burn, it'd be operating at a loss, even if hardware were free... that seems unreasonable?
At the minimum, as there's 35k votes, and the user threw away 1000, that should at least count as a 'vote' so 1/35 = 2.8% at the bare minimum without recouping any of the initial 1000 burned, so still losing SEM.. Think at 5-8% fee it was something like a year to break even? 25% is like 3 months to break even.
Also you might consider updating your table to add SEM/vote, as it looked like animal pool was really high paying, but doing the math, it was the lowest one.
How did you come to such conclusion? 75 mil coins are block rewards. Divide it by 100 validators. At 2% pool fee it makes 15k. And also there are tx fees.
And even if you look at one year time frame. It's 3153600 per year. 31k per validator. At 3% fee they get their money back in a year.
In conclusion, 3% is the reasonable fee.