I've seen a couple of redesigns of HN in my time and I have to say, your redesign is by far the best I've seen of any HN redesign. You've obviously put a lot of thought and effort into this, the complexity of the Y meter is just crazy. Great job on the design thinking, I think regarding the use of the Y meter in some places is confusing and contradictory to how you've used it elsewhere. With exception of that, I can't fault your redesign, nice and clear.

And can I just say, the inclusion of the search bar at the top pleases me. I hope one day HN has a search bar because sometimes I like to search for content on HN, but have to use third party sites.