For me, the most exciting part of HF19 is that MY upvotes are worth actual money now. I worked for two months, every day, to build a following and some SP that would let me add .006 to someone's post. It wasn't much, but it was something. Now, my vote is worth a quarter or more, which makes me a lot more likely to pick good content, but also more excited to give that upvote to people that deserve it. It's changed how I interact with the site. For the better, I think.