Voted for

• YES

I wrote quite a lot about this in my posts/comments, but to sum it up:

Increase curation rewards to 50%

1.) Important in combination with better downvotes, to incentivize people to vote on great content. More curation => bigger incentive.
2.) 50/50 gives stakeholders more incentives to vote on other posts (instead of self-voting)
3.) Last but not least, to reward people that are staking Steem as Steempower. Which could result in less selling-pressure => higher Steem price.

Use a convergent linear rewards curve (n^2/Cn+1)

The current linear rewards curve isn't great, but it could be better. And the convergent linear curve seems to provide this. Now, if it doesn't work out, we'll just change it back. But we need to test it out, in order to make sure we've got the right configuration of this system.

Use a separate downvote pool of roughly 25%

Downvoting is important, but there is literally not a reason for stakeholders to do so, besides out of their own moral (at least in a big scale). There is no direct reward associated with downvotes; no curation and no author rewards. And those trying to maximize their stake, to get back some of the value they lost after the harsh Steem evaluation drop of up to 90%, will not downvote in its current form.