I like the new design a lot, everything is consistent and easier to read now. Opening links in a popover is nice (although a little laggy) because I don't lose my scroll position after closing the page, which eliminates needing the Reddit Enhancement Suite extension. The page is also responsive now, previously the side bar would restrict the comment area.
Bah, just be an API endpoint and let everyone use their own client. The only value in Reddit is the centralization and organization of users and subreddits.