I have a similar idea how we could evolve the voting. here are my thoughts to it:
 
## We should also think about improving voting:
I would suggest to allow 3 different kind of votes:
* If you press the first time up-vote you only rank the post higher, no extra payout.
* If you press the second time up-vote your vote is also considered for the payout.
* If you press the third time up-vote you indicate that this post is very very important for you.

Important posts could be valued higher lets say 10x your voting power, but should be more limited then normal up-votes, lets say max 30 in the last 30 days.
This would also solve the problem, that many post get lot of payout, that simply link to a breaking news, like for example the post of the bitfinex hack. With this in place we could just make the post with the braking news more visible without giving an extra money for a post that is done in 10 seconds and would be more like a normal reddit / facebook like.
The same voting we could also do the opposite way: 
* 1 time pressed down-vote, the post just gets less visible (warning / yellow card)
* 2 time pressed down-vote, you reduce the payout, same way as now. (red card)
* 3 time pressed down-vote, your vote is counted 10 times, but limited to 30 times per 30 days (super dark red card)

The above is part of a bigger post where i tried to outline how we could evolve voting and some other current issues:
https://steemit.com/steemit/@arcurus/tagging-and-flagging-hidden-by-a-whale-how-to-evolve-further