Hi @calumam,
I can't tell concretely from this post if 75/25 is weighted toward the author or the curator.
Some years ago we had 75/25 weighted to author. That was the age of bidbots and delegation rentals. Bidbots would rent staked power from whales. If you pay a bidbot then they would vote for your posts. That created a sick culture. In a best case scenario creators will create a lot to get votes but considering the return for curation is only 25% they wouldn't have much reason to stake power and their influence declines even thought they are making content.
Now if the vote was weighted toward the curator 75/25 then curation would become masturbation or at best circle jerking. Most would put their vote where they could get the best return.
It's good to think about every scenario but I can't see anything better than 50/50
