The new teacher dashboard is great. I love being able to see how many students got something right or wrong. And, I can see which students had multiple attempts and which ones finally got it right. All that is great. But it would really be nice to be able to see each student's final attempt (whether they got it right or wrong, but especially if they got it wrong). That would help a lot with diagnosing student misconceptions. If you look at Desmos.com Marble Slides activity, you can see an example of this in action.
If you had a feedback button on the assignment page, I would have shown you a screen shot of what I am talking about. You should really consider adding context sensitive feedback buttons throughtout.