I also agree that cutting it by 75% would be a bit too much at once, although might be necessary to see the effects of it more clearly if it would be adjusted higher a bit later.

One idea I heard from @smooth recently which I hadn't thought of at all was if downvotes instead of just lowering post rewards would also eliminate the curation returns of early voters (i.e. those pre-5mins), although some content doesn't necessarily take longer than 5 mins to consume I thought it was an interesting experiment to disincentivize front-runners and maximizers getting ahead of huge votes. Wonder what it would mean to votes being queued to be cast at exactly 5mins and if they'd all fit in the same block or how the chain would calculate as to who allow to go through in that block before its full.