Just to give another example:

If we had decoupling the curation reward from post, then it become possible to reward voters who use their down-vote/flagging wisely.

In current curation scheme, there is a biased towards up-vote -- those who cast an upvote has nothing to lose, but those who perform flagging has nothing to earn.

If we had un-tied curation reward from post reward, then we can reward the curators in both scenario whether the total-votes for a post end up negative or positive... So, when a post has a positive accumulated votes, all up-voters get rewarded, while if a post get negative in consensus, then down-voter will get the curation rewards.

This symmetric curation scheme might be a fairer ground for all curators.