Not a fan so far. The 'unread content' thread presentation is my most disliked aspect. So giant and blocky and facebook-ized, and it looks nothing like the forum list of threads.
In general, so far I have to say I dislike the visual presentation. It seems like the same bad UI philosophy change that's been percolating through technology for the last 5 years or so...giant blocky wastes of screen space with big flat colorful buttons every where. I think that somebody somewhere back then decided that we can't handle dense lists, plus they are all desperate to turn everything into a phone.
I'm sure the technical underpinnings are a big improvement, though, and I'll eventually get used to the visuals if history is any guide.