Under the new courses tab on the teacher dashboard, you are still able to see and filter the total amount of time students have spent on any particular course, but you are now also able to see students' recently completed nuggets. This includes how many in the class have completed a nugget and the class's average score in that nugget.
It is possible to timestamp this so that you can see which nuggets your students have completed in a particular time period. You are also able to click on a nugget and be taken immediately to the nugget tab where you can see an in depth question level analysis for every student that has completed that nugget. You can find an article on how to use the nuggets tab here.