"When users submit their vote they should be directed to a link explaining how the curation reward system works, educating users is key and I think that introducing curators/authors percentage will actually help in that regards."
I am sure people will object that this will be "confusing" for some users.
Perhaps a tooltip that you get when hovering over the upvote button, that shows something like "Estimated .1 SP for curating this content", would convey that more smoothly. It could be wildly inaccurate (and say estimated on the tooltip), but simply making people aware of the concept while requiring nothing of them could be very beneficial.
"I also think that authors should have the option to keep 100% of the rewards for themselves, the wider the spectrum the better. I agree entering a precise percentage is preferable because this will make every single post different and encourages curators to search for new content."
I agree wholeheartedly. I merely didn't add those options on my image because I was fudging it in ms-paint and figured I got the idea across...