@phenomlab - hey, I'm Vlad, I'm working with NodeBB team on Harmony theme design. So you can blame me for most design change while we polish the details and experiment with various options!
Adding color to a post counter when the topic's unread is a great idea - thanks for it!
In your screenshot the unread dot looks particularly small! It might a bug. Will look into it.
I must admit I was the one who promoted consistent topic title text color. It's quite probable that, while striving for the page to look good, I broke your user flows accidentally. My apologies! Let's bring the blue color back for unread titles.
I will, however, stay strong on keeping the font weight. I did reduce it from 700 to 500 (not 400 or 300 actually). Can you spend some time with this font weight and let us know your opinion after you get used to it a bit?
Thanks.