<Can you please provide some detail as to why you have such a regard for this proposed redesign format? Details are needed here. Why is it liked or to the contrary, disliked?>
Jeff, I gave some specific reasons elsewhere in this forum. But my major concern is the way the Discussion Redesign organizes the posts in terms of "oldest" or "newest" first. I do prefer posts to be ordered from oldest first. But the way Canvas now determines this order is based on the date/time of the REPLIES rather than the "parent" post. The way I use discussions with my students also requires that students be aware of what has been posted before they post. I do not want students posting duplicate questions or repeating what others have said. Thus they need to be able to see what was posted previously (both in terms of parent as well as reply posts). If the ordering of posts is going to vary each time a user views a discussion, based on which parent post has newer replies, that is going to cause a LOT of confusion for both myself and my students.
I also find the "thread tray" awkward to use and, ultimately, should be unnecessary when the old method of "collapse/expand replies" serves the same purpose in a simpler way. As well, being able to view ALL posts "expanded" on a single page makes it easier to use the browser "find" function to locate posts from a specific user and keep those in context with other posts in the discussion. (I have seen someone else mention this as an issue of concern).
The method of marking a post or thread as "read" or "unread" is also not as simple as it was in the old format. As I have seen others mention, that now requires two clicks (open the menu and then click a selection) vs. simply clicking to toggle the green dot on or off.
Then there is the new "quote" option for replies. While being able to quote a specific section of a post we are replying to is actually quite helpful, this is not helpful if the "quote" button copies the ENTIRE post (especially if it is a lengthy post) we are replying to. Rather, we should be able to select specific lines we are responding to (or edit out what we are not responding to). In the old format, I would simply copy and paste between <brackets> text from the post I was replying to (as I have done with your comment above). So not even having a "quote" button is not really a problem.