We were so excited to have Checkpoints, and indeed those work really well; points, calendar, grading and more. We turned the feature on immediately on Jan 18.  Thank you Instructure!  Teachers love it.  Canvas Canvas Release Notes (2025-01-18) - Instructure Community - Discussion Checkpoints

But, the change to Speedgrader for all graded discussions, whether or not they use checkpoints, is causing distress. 

• Instead of seeing all the posts from the student on one screen by default, it can only show the full discussion with Next reply and Previous reply buttons necessary to scroll between the one student's posts.  Teachers report this has more than doubled grading time, especially with large classes.  
• If posts are on different pages, it has to load the entire new page to highlight the student's next post.  All the posts scroll by while it moves the focus. 
• Even if all the discussion's posts are on one page, there's a significant delay while it loads, especially if there are images or videos. 
• There is no indication of how many posts the student made, so you need to keep moving to next (or previous) reply until you return to the first one.  If there are more than 2 or 3 posts it's hard to keep track of which ones you've seen so one rotates around again. 
• If there is only one post, we waste time trying to go to the next one.
• Currently, the discussion search box doesn't work properly in speedgrader, stops with an error on each letter you enter before searching for it.  That is a bug and will get fixed I'm sure; hopefully soon.
• One benefit is that you always see the post in context, but the slowness makes the benefit less useful unless it's a short discussion.

Are others trying out this new feature?