Hmm, not really a fan of the new design for the following reasons:
1. Pale blue background with white comment boxes over it is not very visually appealing. Ditto for the pale beige quote boxes.
2. The quote, reply, and like buttons are now small icons without words. Also where did the multi-quote button go?
3. Now have to click the green circle next to the heart icon to see who liked a post
4. Rounded avatar icon reduces usable space cutting off parts of your avatar
5. No more indicator whether someone is online/offline (currently to the right of username)
6. New "Your menu" bar combines what was two separate areas (user account info and trending now/unanswered threads/etc.) in the process losing Top forums, Member Shoutouts, and forum search/advanced search options. It also now requires an extra click (ex. on down arrow next to it) to get to Participated, Subscribed, My Threads, etc.
Hopefully there will be an option to stay/revert to the current design when the new one goes live as I think it has a cleaner more straightforward functional design.