Looking at the curation reward, there are a few things that should change, in my opinion.
Curation reward is for the upvoters, who upvote after reading the post and like it. But with the induction of Bot systems, where you have to pay some amount to the bot to get an upvote, curation reward should not be allowed for bots.
As they are paid for their upvote so they don't deserve the curation reward. And that reward should only be distributed among the one's who upvote the post without any payment.