The mathematics are sound, but this proposal is at complete odds with the reality of Steemit. Today, Steemit is heading towards more diverse content because there are a handful of human curators who spend time, dig for good content, and upvote several posts a day.
This proposal massively disincentivizes actual curators, and transfers power over to casual curators who vote less 5 posts per day. These are the type of users who check out what's trending and vote on what they like.
Net result - the curation community will come to a halt, the Trending page be more predictable than it ever was.
Yes I think this is a very undesireable effect.
The trending page is the first thing non-users will see.
OTOH...we can always see what effect it will have in practice. People might not care. Though there does seem to be a strong tendency for users to vote-as-bet.