A few new keybindings aren't documented yet... v (end) t (top)  change upper threshold and
The only major complaint so far is that the design changes consume a lot more whitespace. I have mixed feelings on the subject, but am aiming to strike a balance. We noticed 2 very clear places where the whitespace is excessive and hopefully that will be fixed RSN. But on the other hand, making deep threads visually clear, and drawing some attention to the 'reply' buttons is beneficial to everyone, so bare with us as we work to strike some sort of balance.