Thanks. This is great news that Steemit are taking a closer look at the economics and reward incentives.

I agree with (2) increasing curation rewards and (3) separate downvote pool. I am not sure about the 'convergent linear rewards' curve. I fear that such a curve could hurt new users and those with low SP. Getting the formula correct could be tricky. Based on @vandeberg's post the formula would be something like n^2/(n/c+1). 'c' being the most critical parameter in this equation. Too low, it makes almost no difference and too high the new users could be too heavily penalised.

I think different formulae for the rewards curve should be investigated but I would not jump on the current proposed 'convergent linear rewards' curve.