The new interface looks nice but missing some information. Previously there was schedule of the courses which will tell us how many hours of lectures and labs is there for each chapter. This helped us understand whether we have enough time to start a new chapter. Now there is no easy way of knowing that. I agree that we can stop and start again when ever we want but with an idea about how much is the duration it would have been a lot better.
Well, we used to get a number of comments (complaints??!!) that the timings weren’t very accurate. However, I agree that they can be helpful myself. I’d suggest however that you post this comment using the “Report an Issue” option at the very bottom of the display. That goes directly to the curriculum team and I assure you they take all these comments very seriously. Good luck.