RE: What is excellent about HF20?
I really like voting mana, which they undersold even further in this update than they have before.
What I find not-so-excellent is the overall approach which prioritizes punishing undesirable behaviors rather than making things better for anyone. The idea that you can "improve user experience" by allowing new users to vote and not telling them that it won't count for anything is deeply troubling on an attitude level even if the actual effect is almost too tiny to care about.
Similarly the focus on killing off the way that early vote curation goes to authors without finding anything good to do with the money that's going in that direction now is troubling. I can see the desire to remove that functionality, but the choice to "return the excess to the pool" is a very bad way to go about things and is going to cause all sorts of unintended weird behavior.
And underselling voting mana falls in with this, as they keep acting like it's there to solve a couple of obscure bugs no one cares about when in fact it's a serious upgrade to the voting system.