I agree that bidbots did ruin the 75/25. I will defintely be keeping an eye on how things turn out a year from now.
The way I was seeing it play out long term is that bidbots were kind of being handled somewhat by the free downvotes thing. I do agree that the curve changing is a good change.
How about 55/45 or 60/40? I realize 50/50 and 75/25 is easier to comprehend due to multiples of 25% and most people can easily thinkg of that.
I don't really have an opinion on the number but I do have an opinion that how well it works overall (and by "works" I mean more broadly including growth, not just the narrow notion of "rewarding authors") is more important than the number.