I happen to think self voting will go up if curation rewards increase. I think bots will have a bigger role to play. I think this may work against your otherwise worthy plan.
I ultimately think if we're going to be in HF19 land and have linear voting we need a separate pool for down votes. I also think we need 3 vote types: upvote, downvote (no rep change), and flagging to effecitvely combat disagreement on rewards. Finally a locked SP without voting rights with a higher rate of return would be swell too.
I agree with you on the part that says voting will go up if curation rewards increase.. I have seen someone who liked my work but refused to up vote.. But this bots will earn more