No, we should not introduce a Voting Slider or change the curation percentage, because this is not the fundamental problem with Steemit.
We need to acknowledge that the Proof of Brain mechanism of Steemit doesn't fit to the overall Dapp ecosystem of the Steem Blockchain. Instead of thinking how we can improve the Author / Curation system we should think about how we can change the rules of the reward pool distribution for the whole Steem Ecosystem. My proposal would be to get rid of Steemit exclusive right to mine Steem Tokens. Steemit should become its own SMT project so that the Reward Pool is free of this entanglement. Than we can develop the Reward Pool towards an DAPP Ecosystem which should put Steempower Holders, RC Holders and Voting rights for Witnesses in the center of the Ecosystem.
Why should we mine Steem by only posting and Blogging on Steemit when the whole Ecosystem is changing towards Dapp Economy??? Please, guys lets take this serious there is no need for changing just the Curation Author reward system we need complete change of the Reward Pool Structure!