-- Good analysis. A few of us recently also looked into capping curation rewards however found it has weaknesses that allow whales to game the rewards. We haven't recently looked as deep into capping the total blog post rewards. If a large group of steemers see a net benefit but it also seems to be a divisive issue, then it could be proposed to move to the new system for only a short period of time (e.g. 2 weeks) as a trial period.
-- The chain supports per-post-cap already, but that option is not shown in current UI so far.
-- 2 weeks trial of capping total post rewards is well worth a try. Whales would have to spread their rewards out over a greater number of posts. Perhaps implement the cap as being effective after a blogger has already received rewards over $500 for 2 posts, this way every blogger has a chance to score big at least 2 times.
see full discussion @ https://steemit.com/steemit/@dana-edwards/why-a-steem-power-reward-cap-would-be-as-controversial-as-the-block-size-cap-in-bitcoin