I hear what you're saying. To keep it simple, I was thinking of calculating the rewards in proportion to the vote negative rshares compared to the total so yes, technically, a whale using a full weight flag is going to get more than a minnow with the same.
I don't necessarily see a problem with stake being a benefit for curation but I am not a fan of it being used on the author side. I have grown sick of the "Well I invested money in the platform so I get to put my comment/post at the top" mentality.
But yeah, with our only able to set 50/50 rewards, not sure what the function of SP would have in light of this projects intent. I could have it upvote the flaggers last post which I could see as being a nice benefit.
I'm up to work on the project and see if there is any merit to it..