my 2 cents, for whatever it's worth..
1) I tend to hit the back button to go back to the forums. the new format seems to be slightly longer to flip between pages; forward, back, next, etc..
2) not a fan of the 'like'. seen it abused toooo many times in the past. If I recall, we did once have it here (or TRF) I like Angie, so I'll like all her posts. Regardless of whether they offer help, sound advise, positive comments, etc.. I don't like John, so I won't like any of his.. Even though he may be the expert on [insert topic here]... (Actually, I like John too, and his [insert topic here] skills are truly top notch!
)
3) I miss the indication of where that person is from.. Kinda lends a bit to them, their post, and helps pad their post with their demeanor / intent..
4) quoting comments seems rather small..
5) no 'go to last post' button in the forum thread title, we used to have that, helps sometimes to just jump to the end of the thread to post.
6) Dunno if I care to see the avatars of the thread starters. I like the simpler common icon, and whether its blue for 'new content' or grey, or locked!