I understand why they disabled public downvotes (since they're accepting incoming ones now, they don't want to expose everyone's downvotes from other instances), and I remember they gave some reasoning on Github for why it makes sense to not hide upvotes too, but do we really need incoming downvotes? I think that feature should be a toggle where you either have downvotes hidden but federated, or visible but not federated. And then the instance owner can decide what they prefer.
That's really my main issue with mbin. While I've gotten too used to the All Content view and collections, both of those are on their roadmap, so they'll be coming eventually.