I don't have an opinion on the 'random curation' proposal, but in general any proposal for randomness on a blockchain is an extremely difficult proposition. I saw one of the replies mentioned looking at the previous block hash. That works to a point, but isn't entirely safe or fair because the block creator can tinker with the block in ways to change the hash into one that subtly favors themselves or a collaborator and it is very difficult to detect this (particularly on non-PoW chains).

Anyway, I don't rule it out, I just haven't studied it enough to have an opinion at this time. There are some ways to properly address the randomness issue if it is really necessarily and helpful, but they are definitely harder than just looking at a block hash and you should be suspicious of someone who suggests that; they probably don't understand blockchains very well.