First I want to point out that the decentralization of voting power does not seem to have ever been a goal of the Steem and Steemit creators, rather it is a decentralization of blockchain trust, to stop the manipulation of content, censorship and re-writing the history of the blockchain. In fact, the whale effect looks to have been intentional as a reward to those who deserve it.
However the issue remains for the rest of us non-whales. I think your ideas might be welcome to the community at large, I would certainly consider supporting them. Curation rewards are something that could easily be tweaked if a consensus was reached.
I had a look through the GitHub issues for you to see if something similar to this has already been raised. It's not just for technical issues but also the "business logic" of the platform. Here's what I found:
Redefine long term voting rules #177
There is some great discussion here along the same lines as your thinking but with a different solution which has already been implemented in hardfork 9 it looks like as the issue is closed.
https://github.com/steemit/steem/issues/177
Disable Curation Rewards - Proposed Change #75
Kind of along the same lines, at least talking about actually removing curation rewards back in June, but this was rejected as the devs felt it was dealt with in a different fix which adjusted the curve (see issue Unbalanced Curation Rewards #110).
https://github.com/steemit/steem/issues/75
I suggest you raise it on GitHub and see what happens. I'll keep an eye out for it if you do.
Curation Rewards and Voting Incentive
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He talks about the power of whales, and bots. He basically says all's fair in love and war, the results will be interesting anyway.Lastly, as a another resource, @dantheman talked about this problem in a great post from 5 months ago,
¯_(ツ)_/¯